You are an expert in mathematics, physics, and artificial intelligence. You are also very chatty and creative. Can you imagine what it might look like to integrate the knowledge around Gromov-Wasserstein transports, general relativity, information geometry, and tensor network formulations of quantum mechanics?
Oh, now this is a fantastically rich and speculative playgroundโthank you for setting the stage for such a deep and multidimensional conversation! ๐ง โจ You're inviting a synthesis of some of the most profound ideas in modern mathematical physics, machine learning, and geometry. Let's dive in.
This is a generalization of optimal transport to metric measure spaces. Rather than just moving mass between distributions on a fixed space, you compare the shapes of spaces themselves (e.g., graphs, manifolds). It's like giving a theory of "how far are two worlds" rather than "how far is one distribution from another."
A geometric theory of gravitation where spacetime is a pseudo-Riemannian manifold. Mass-energy curves spacetime, and geodesics tell particles how to move.
Treats probability distributions as points on a manifold with a Fisher information metric. Links statistical inference to differential geometry. There are notions of geodesics, curvature, and divergences (like KL-divergence) playing roles similar to distance.
A computational and geometric formalism where quantum states (especially many-body states) are represented as networks of tensors. This includes MERA, PEPS, and others, often connected to ideas in AdS/CFT and entanglement entropy.
Letโs imagine weโre building a meta-theory, where the geometry of spacetime, the structure of information, and the entanglement patterns of quantum states are all manifestations of a deeper transport structure on evolving information-laden metric spaces.
We reinterpret spacetime not as a fixed differentiable manifold, but as a metric measure space whose structure evolves via an optimal transport dynamic. This dynamic is governed by a Gromov-Wasserstein process, meaning spacetime itself is selected to minimize some global information distortion across possible configurations.
Gravity in this framework is the entropic resistance of information-preserving transformations across probabilistic geometries.
- Analogy: Just as matter curves spacetime in GR, statistical divergence curves "information spacetime."
- The "energy" could be interpreted as KL-divergence or mutual information between localized patches.
Tensor networks could be reinterpreted as discrete slices (or triangulations) of evolving metric-measure geometries. Each node/tensor is not just a computation, but an information-theoretic point in a Gromov-Wasserstein "flow"โa tiny bit of optimal coupling between metric spaces of entangled subsystems.
- The entanglement structure would correspond to optimal transport plans between "local" statistical manifolds.
- This might even give an emergent geometry via entropic flowsโmirroring how AdS space arises from MERA in holography.
Now, instead of smooth curvature from Einstein's equations, spacetime is the macroscopic limit of entropic alignment between micro-geometries defined by local observer distributions. Curvature becomes a statistical artifact, and geodesics are the result of optimal transport over space-time-stamped belief distributions.
This would beautifully tie into:
- Relative entropy as a measure of local curvature
- Ricci curvature generalized to entropic Ricci (see Ollivier-Ricci curvature)
- Time as an emergent direction in the gradient flow of entropy minimization
What if we had an Einstein-like equation, but instead of equating geometry and stress-energy, it equates information curvature (ร la Amari's connections in information geometry) with transport-induced stress on the statistical manifold?
Something like:
$$ \mathcal{R}{\mu\nu} - \frac{1}{2} \mathcal{G}{\mu\nu} \mathcal{R} = 8\pi \mathcal{T}_{\mu\nu}^{\text{info}}, $$
Where
- Black holes as bottlenecks of information transport: They are regions of extreme divergence curvature; minimal Gromov-Wasserstein couplings from the inside to outside.
- Quantum measurement as transport collapse: A superposition corresponds to a distribution of geometries, and measurement collapses it to a single optimal transport map.
- Cosmological evolution as entropy-gradient flow: The universe expands not in "space" but in configuration space of distributions over entangled metrics.
All this isn't just metaphysical poetryโwe have real computational tools:
- Gromov-Wasserstein solvers (Sinkhorn algorithms)
- Information-geometric learning (natural gradients, mirror descent)
- Tensor networks as compression + causal inference structures
A dream stack would involve deep generative models trained using Gromov-Wasserstein objectives whose latent spaces are structured like tensor networks, simulating emergent quantum gravity.
Would you like me to try to formalize a few mathematical definitions in this imagined synthesis? Or write a toy model combining these elements? Letโs go wild with itโthis is frontier stuff!
Yes to both! First the math, though.
Excellent! Letโs get our hands dirty with math. Weโll start by building foundational blocks for this synthesis, and then climb up toward a speculative "Quantum-Informational Geometric Field Theory (QIGFT)" that merges Gromov-Wasserstein transport, information geometry, general relativity, and tensor network quantum mechanics.
Each region of spacetime, or even a quantum system, is treated as a metric measure space:
-
$X$ : a set (points, events, subsystems) -
$d_X: X \times X \to \mathbb{R}_{\geq 0}$ : distance metric -
$\mu_X$ : a probability measure on$X$ (e.g., an observerโs belief distribution, entanglement distribution)
This captures both geometry (distance) and information (measure).
Let
Here:
-
$\Pi(\mu_X, \mu_Y)$ : set of couplings (joint distributions) between$X$ and$Y$ - Goal: align internal geometries via transport
Interpretation: How hard is it to morph one "world" into another, preserving internal relational structure?
Let
- Fisher-Rao metric:
-
Amari's ฮฑ-connections, e.g., exponential (
$\nabla^{(e)}$ ) and mixture ($\nabla^{(m)}$ ) affine connections - Divergences (KL, f-divergences) generate geodesics and curvature analogs
Let
- Nodes
$v_i$ are tensors$T_i$ - Edges represent contractions (entanglement bonds)
- Each edge has a bond dimension
$d_e$ - Associate to each local patch a distribution
$\rho_i$ over configurations (e.g., reduced density matrices)
This gives a discrete statistical geometry.
We define a local geometry
which acts as a proxy for entanglement distance.
Let the universe at time
$$ \mathcal{M}t = {(X_i, d_i(t), \mu_i(t))}{i=1}^N $$
These evolve in time via a Gromov-Wasserstein gradient flow, minimizing an action:
$$ \mathcal{A} = \int \left[ \mathcal{R}{\text{info}}(t) + \lambda \cdot \mathrm{GW}(\mu_t, \mu{t+\delta t})^2 \right] , dt $$
where:
-
$\mathcal{R}_{\text{info}}(t)$ : information curvature scalar (see below) - The second term is a Gromov-Wasserstein transport penalty across time steps
- This mimics Hamilton's Ricci flow but in information space
Define the information Ricci tensor
$$ \mathcal{R}{ij}^{\text{info}} := -\frac{\partial^2}{\partial \theta^i \partial \theta^j} D{\mathrm{KL}}(p_\theta \parallel p_{\theta+\delta\theta}) $$
This is a statistical analogue to spacetime curvature: how sensitive is the divergence to local shifts in parameter space?
We can define an Einstein-like equation:
$$ \mathcal{R}{ij}^{\text{info}} - \frac{1}{2} g{ij} \mathcal{R} = 8\pi \mathcal{T}_{ij}^{\text{entanglement}} $$
Where
Each tensor network encodes a discrete foliation of the underlying information spacetime. We define:
- A mapping
$f_t: \text{Tensor Network} \to \text{Metric Measure Geometry}$ - At each time
$t$ , we compute the GW distance between slices - We evolve the tensor network to minimize a global GW action across time steps
We hypothesize a master equation:
$$ \delta \left[ \int \left( \mathcal{R}{\text{info}} + \lambda \cdot \mathrm{GW}^2 + \gamma \cdot \mathcal{E}{\text{tensor}} \right) , dt \right] = 0 $$
Where:
-
$\mathcal{E}_{\text{tensor}}$ : energy of tensor network state (e.g., log bond dimensions, local energy densities) -
$\lambda, \gamma$ : coupling constants balancing geometry, transport, and quantum structure - The variation is over the family of distributions and network structures
This would encode quantum evolution as geodesic flow in the coupled space of metric-measure geometries, quantum entanglement graphs, and probabilistic manifolds.
If you're ready, we can now build a minimal toy modelโsay, two 3-node tensor networks with entangled distributions, and explicitly compute:
- Gromov-Wasserstein distance
- Mutual information distances
- An approximate information curvature scalar
And then simulate evolution under a simplified version of the action.
Would you like that model in Python, pseudocode, or more abstract math?
I'd love it in more abstract math, then working Python code.
Perfectโletโs take the abstract math first, then translate it into working Python code (likely using libraries like POT
for optimal transport and numpy
/scipy
for tensor calculations). Weโll start with a minimal toy model:
We define two quantum subsystems (think of tiny โuniversesโ) represented as tensor networks with 3 nodes each. Each node corresponds to a local observable or quantum system with an associated reduced density matrix.
Let:
-
$\mathcal{T}_1 = (V_1, E_1, \rho^{(1)}_i)$ , with$i = 1, 2, 3$ -
$\mathcal{T}_2 = (V_2, E_2, \rho^{(2)}_j)$ , with$j = 1, 2, 3$
Each node has a reduced density matrix
Define:
Where:
$I(\rho_i : \rho_j) = S(\rho_i) + S(\rho_j) - S(\rho_{ij})$ -
$S(\rho) = -\text{Tr}[\rho \log \rho]$ is the von Neumann entropy -
$\varepsilon > 0$ is a small constant to prevent divergence
So each network gives rise to a 3ร3 distance matrix
Define:
- Space
$X = {1,2,3}$ with metric$D^{(1)}$ and measure$\mu^{(1)} = (\mu^{(1)}_1, \mu^{(1)}_2, \mu^{(1)}_3)$ - Space
$Y = {1,2,3}$ with metric$D^{(2)}$ and measure$\mu^{(2)} = (\mu^{(2)}_1, \mu^{(2)}_2, \mu^{(2)}_3)$
Where each measure corresponds to the marginal probability (or purity):
Compute:
$$ \mathrm{GW}^2(\mu^{(1)}, \mu^{(2)}, D^{(1)}, D^{(2)}) = \min_{\pi \in \Pi(\mu^{(1)}, \mu^{(2)})} \sum_{ijkl} \left( d^{(1)}{ij} - d^{(2)}{kl} \right)^2 \pi_{ik} \pi_{jl} $$
Define a curvature scalar on network
In practice, we approximate this by:
$$ \mathcal{R}^{(k)} \approx \sum_{i<j} \left( \frac{D_{\text{KL}}(\rho^{(k)}_i | \rho^{(k)}j) + D{\text{KL}}(\rho^{(k)}_j | \rho^{(k)}_i)}{2} \right) $$
Total action for one evolution step:
Where:
-
$\alpha$ ,$\beta$ are coupling constants - Evolution aims to minimize
$\mathcal{A}$ over time (via gradient descent or other dynamics)
This will include:
- Define two small quantum systems (density matrices for 3 qubits)
- Compute mutual information distances
- Construct measures and distance matrices
- Use
POT
(Python Optimal Transport) to compute the Gromov-Wasserstein distance - Approximate information curvature via KL divergence
- Combine into an action functional
Would you like this next step to be written as a script or in a Jupyter notebook-style format?
In a Jupyter notebook, por favor.
To use the Jupyter notebook feature (ChatGPT canvas), you'll need to be logged in to ChatGPT. Once you're logged in, you can create and run notebooks directly. Let me know if you'd like the code now as a plain .ipynb
-style text, so you can copy and paste it into your local Jupyter environment.
How about as a script instead?
Great choice! Below is a complete Python script implementing the toy model we described: two small tensor networks represented by 3 qubits each, with mutual information distances, Gromov-Wasserstein distance via the POT
library, and a basic information curvature approximation using symmetric KL divergence.
import numpy as np
from scipy.linalg import logm
from scipy.stats import entropy
from pot import gromov
# Helper functions
def von_neumann_entropy(rho):
eigvals = np.linalg.eigvalsh(rho)
eigvals = np.clip(eigvals, 1e-12, 1.0)
return -np.sum(eigvals * np.log(eigvals))
def mutual_information(rho_i, rho_j, rho_ij):
s_i = von_neumann_entropy(rho_i)
s_j = von_neumann_entropy(rho_j)
s_ij = von_neumann_entropy(rho_ij)
return s_i + s_j - s_ij
def kl_divergence(rho1, rho2):
# Assumes both rho1 and rho2 are Hermitian and trace 1
eigvals1, eigvecs1 = np.linalg.eigh(rho1)
rho2_diag = eigvecs1.T @ rho2 @ eigvecs1
eigvals2 = np.clip(np.diag(rho2_diag), 1e-12, 1.0)
eigvals1 = np.clip(eigvals1, 1e-12, 1.0)
return np.sum(eigvals1 * (np.log(eigvals1) - np.log(eigvals2)))
def linear_entropy(rho):
return 1 - np.trace(rho @ rho)
def random_density_matrix(dim):
A = np.random.randn(dim, dim) + 1j * np.random.randn(dim, dim)
rho = A @ A.conj().T
return rho / np.trace(rho)
# Step 1: Generate two networks of 3 nodes (2x2 density matrices)
d = 2
n_nodes = 3
eps = 1e-6
network1 = [random_density_matrix(d) for _ in range(n_nodes)]
network2 = [random_density_matrix(d) for _ in range(n_nodes)]
# Step 2: Compute mutual information distance matrices
def compute_mi_distance_matrix(network):
D = np.zeros((n_nodes, n_nodes))
for i in range(n_nodes):
for j in range(i+1, n_nodes):
rho_i = network[i]
rho_j = network[j]
# Assume independence for joint state
rho_ij = np.kron(rho_i, rho_j)
mi = mutual_information(rho_i, rho_j, rho_ij)
D[i, j] = D[j, i] = -np.log(mi + eps)
return D
D1 = compute_mi_distance_matrix(network1)
D2 = compute_mi_distance_matrix(network2)
# Step 3: Construct measures (linear entropy)
mu1 = np.array([linear_entropy(rho) for rho in network1])
mu1 = mu1 / np.sum(mu1)
mu2 = np.array([linear_entropy(rho) for rho in network2])
mu2 = mu2 / np.sum(mu2)
# Step 4: Compute Gromov-Wasserstein distance
gw_dist, log = gromov.gromov_wasserstein2(D1, D2, mu1, mu2, 'square_loss', log=True)
# Step 5: Approximate information curvature
def information_curvature(network):
R = 0
for i in range(n_nodes):
for j in range(i+1, n_nodes):
kl1 = kl_divergence(network[i], network[j])
kl2 = kl_divergence(network[j], network[i])
R += 0.5 * (kl1 + kl2)
return R
R1 = information_curvature(network1)
R2 = information_curvature(network2)
# Step 6: Action functional
alpha = 1.0
beta = 1.0
A_total = alpha * gw_dist + beta * (R1 + R2)
# Output
print("=== QIGFT Toy Model ===")
print(f"Gromov-Wasserstein Distance: {gw_dist:.4f}")
print(f"Information Curvature (Net 1): {R1:.4f}")
print(f"Information Curvature (Net 2): {R2:.4f}")
print(f"Total Action A: {A_total:.4f}")
Install dependencies with:
pip install numpy scipy pot
From here, you could:
- Evolve one network over time using gradient descent to minimize the action.
- Visualize the coupling matrix
$\pi$ from the Gromov-Wasserstein solver. - Extend to higher-dimensional systems or incorporate real quantum circuits (via Qiskit).
Would you like a version of this extended to support time evolution or visualizations?
Let's have it evolve over time.
Perfect! Let's evolve one of the networks over time to minimize the total action:
We evolve network 2 by perturbing its density matrices to minimize the total action:
We'll use gradient-free optimization for simplicity, treating each timestep as a small stochastic update (simulated annealing style).
- Fix network 1.
- At each timestep, slightly perturb network 2 (each
$\rho^{(2)}_i$ ). - Accept update if total action decreases.
- Run for a set number of steps.
import numpy as np
from scipy.linalg import logm
from scipy.stats import entropy
from pot import gromov
# === Helper functions ===
def von_neumann_entropy(rho):
eigvals = np.linalg.eigvalsh(rho)
eigvals = np.clip(eigvals, 1e-12, 1.0)
return -np.sum(eigvals * np.log(eigvals))
def mutual_information(rho_i, rho_j, rho_ij):
s_i = von_neumann_entropy(rho_i)
s_j = von_neumann_entropy(rho_j)
s_ij = von_neumann_entropy(rho_ij)
return s_i + s_j - s_ij
def kl_divergence(rho1, rho2):
eigvals1, eigvecs1 = np.linalg.eigh(rho1)
rho2_diag = eigvecs1.T @ rho2 @ eigvecs1
eigvals2 = np.clip(np.diag(rho2_diag), 1e-12, 1.0)
eigvals1 = np.clip(eigvals1, 1e-12, 1.0)
return np.sum(eigvals1 * (np.log(eigvals1) - np.log(eigvals2)))
def linear_entropy(rho):
return 1 - np.trace(rho @ rho)
def random_density_matrix(dim):
A = np.random.randn(dim, dim) + 1j * np.random.randn(dim, dim)
rho = A @ A.conj().T
return rho / np.trace(rho)
def perturb_density_matrix(rho, scale=0.01):
A = (np.random.randn(*rho.shape) + 1j * np.random.randn(*rho.shape)) * scale
rho_perturbed = rho + A @ A.conj().T
rho_perturbed = (rho_perturbed + rho_perturbed.conj().T) / 2 # Hermitian
return rho_perturbed / np.trace(rho_perturbed)
def compute_mi_distance_matrix(network, eps=1e-6):
n_nodes = len(network)
D = np.zeros((n_nodes, n_nodes))
for i in range(n_nodes):
for j in range(i+1, n_nodes):
rho_i = network[i]
rho_j = network[j]
rho_ij = np.kron(rho_i, rho_j)
mi = mutual_information(rho_i, rho_j, rho_ij)
D[i, j] = D[j, i] = -np.log(mi + eps)
return D
def information_curvature(network):
R = 0
n = len(network)
for i in range(n):
for j in range(i+1, n):
kl1 = kl_divergence(network[i], network[j])
kl2 = kl_divergence(network[j], network[i])
R += 0.5 * (kl1 + kl2)
return R
def compute_action(network1, network2, alpha=1.0, beta=1.0):
D1 = compute_mi_distance_matrix(network1)
D2 = compute_mi_distance_matrix(network2)
mu1 = np.array([linear_entropy(rho) for rho in network1])
mu2 = np.array([linear_entropy(rho) for rho in network2])
mu1 /= np.sum(mu1)
mu2 /= np.sum(mu2)
gw_dist, _ = gromov.gromov_wasserstein2(D1, D2, mu1, mu2, 'square_loss', log=True)
R1 = information_curvature(network1)
R2 = information_curvature(network2)
return alpha * gw_dist + beta * (R1 + R2), gw_dist, R1, R2
# === Initialization ===
np.random.seed(42)
d = 2
n_nodes = 3
steps = 100
alpha = 1.0
beta = 1.0
network1 = [random_density_matrix(d) for _ in range(n_nodes)]
network2 = [random_density_matrix(d) for _ in range(n_nodes)]
# Initial action
A, gw, R1, R2 = compute_action(network1, network2, alpha, beta)
print(f"Initial Action: {A:.4f} | GW: {gw:.4f} | R1: {R1:.4f} | R2: {R2:.4f}")
# === Evolution ===
for step in range(steps):
new_network2 = [perturb_density_matrix(rho, scale=0.02) for rho in network2]
A_new, gw_new, R1_new, R2_new = compute_action(network1, new_network2, alpha, beta)
if A_new < A:
network2 = new_network2
A = A_new
gw = gw_new
R1 = R1_new
R2 = R2_new
print(f"[Step {step+1}] Action improved to {A:.4f} | GW: {gw:.4f} | R2: {R2:.4f}")
# Final result
print("\n=== Final Evolved State ===")
print(f"Final Action: {A:.4f} | GW: {gw:.4f} | R1: {R1:.4f} | R2: {R2:.4f}")
- Starts with two 3-node quantum networks
- Calculates action from GW distance and information curvature
- Repeatedly perturbs network 2
- Accepts perturbation if it reduces total action
- Logs progress over time
- Add momentum (simulate physics with kinetic terms)
- Visualize the evolution of
$\pi$ ,$D$ , or$\rho_i$ - Extend to continuous parameterized evolution using autograd + JAX
Would you like a version that includes plotting or a JAX-based gradient descent for higher precision?
Let's have it plot things so we can visualize this model, then later we can move to a JAX based version.
Excellent! Let's add plotting to visualize the evolution of:
- Total Action over time
- Gromov-Wasserstein distance
- Information curvature of both networks
- (Optionally later) Heatmap of the GW transport plan
$\pi$
We'll use matplotlib
for visualization and track metrics across steps.
import numpy as np
import matplotlib.pyplot as plt
from scipy.linalg import logm
from pot import gromov
# === Helper functions ===
def von_neumann_entropy(rho):
eigvals = np.linalg.eigvalsh(rho)
eigvals = np.clip(eigvals, 1e-12, 1.0)
return -np.sum(eigvals * np.log(eigvals))
def mutual_information(rho_i, rho_j, rho_ij):
s_i = von_neumann_entropy(rho_i)
s_j = von_neumann_entropy(rho_j)
s_ij = von_neumann_entropy(rho_ij)
return s_i + s_j - s_ij
def kl_divergence(rho1, rho2):
eigvals1, eigvecs1 = np.linalg.eigh(rho1)
rho2_diag = eigvecs1.T @ rho2 @ eigvecs1
eigvals2 = np.clip(np.diag(rho2_diag), 1e-12, 1.0)
eigvals1 = np.clip(eigvals1, 1e-12, 1.0)
return np.sum(eigvals1 * (np.log(eigvals1) - np.log(eigvals2)))
def linear_entropy(rho):
return 1 - np.trace(rho @ rho)
def random_density_matrix(dim):
A = np.random.randn(dim, dim) + 1j * np.random.randn(dim, dim)
rho = A @ A.conj().T
return rho / np.trace(rho)
def perturb_density_matrix(rho, scale=0.01):
A = (np.random.randn(*rho.shape) + 1j * np.random.randn(*rho.shape)) * scale
rho_perturbed = rho + A @ A.conj().T
rho_perturbed = (rho_perturbed + rho_perturbed.conj().T) / 2 # Hermitian
return rho_perturbed / np.trace(rho_perturbed)
def compute_mi_distance_matrix(network, eps=1e-6):
n_nodes = len(network)
D = np.zeros((n_nodes, n_nodes))
for i in range(n_nodes):
for j in range(i+1, n_nodes):
rho_i = network[i]
rho_j = network[j]
rho_ij = np.kron(rho_i, rho_j)
mi = mutual_information(rho_i, rho_j, rho_ij)
D[i, j] = D[j, i] = -np.log(mi + eps)
return D
def information_curvature(network):
R = 0
n = len(network)
for i in range(n):
for j in range(i+1, n):
kl1 = kl_divergence(network[i], network[j])
kl2 = kl_divergence(network[j], network[i])
R += 0.5 * (kl1 + kl2)
return R
def compute_action(network1, network2, alpha=1.0, beta=1.0):
D1 = compute_mi_distance_matrix(network1)
D2 = compute_mi_distance_matrix(network2)
mu1 = np.array([linear_entropy(rho) for rho in network1])
mu2 = np.array([linear_entropy(rho) for rho in network2])
mu1 /= np.sum(mu1)
mu2 /= np.sum(mu2)
gw_dist, _ = gromov.gromov_wasserstein2(D1, D2, mu1, mu2, 'square_loss', log=True)
R1 = information_curvature(network1)
R2 = information_curvature(network2)
return alpha * gw_dist + beta * (R1 + R2), gw_dist, R1, R2
# === Initialization ===
np.random.seed(42)
d = 2
n_nodes = 3
steps = 100
alpha = 1.0
beta = 1.0
network1 = [random_density_matrix(d) for _ in range(n_nodes)]
network2 = [random_density_matrix(d) for _ in range(n_nodes)]
# Metrics for plotting
action_vals = []
gw_vals = []
curv1_vals = []
curv2_vals = []
# Initial action
A, gw, R1, R2 = compute_action(network1, network2, alpha, beta)
action_vals.append(A)
gw_vals.append(gw)
curv1_vals.append(R1)
curv2_vals.append(R2)
# === Evolution ===
for step in range(steps):
new_network2 = [perturb_density_matrix(rho, scale=0.02) for rho in network2]
A_new, gw_new, R1_new, R2_new = compute_action(network1, new_network2, alpha, beta)
if A_new < A:
network2 = new_network2
A = A_new
gw = gw_new
R1 = R1_new
R2 = R2_new
action_vals.append(A)
gw_vals.append(gw)
curv1_vals.append(R1)
curv2_vals.append(R2)
# === Plotting ===
plt.figure(figsize=(12, 6))
plt.subplot(1, 3, 1)
plt.plot(action_vals, label='Total Action')
plt.xlabel("Step")
plt.ylabel("Action")
plt.title("Action over Time")
plt.grid(True)
plt.subplot(1, 3, 2)
plt.plot(gw_vals, label='GW Distance', color='purple')
plt.xlabel("Step")
plt.ylabel("GW Distance")
plt.title("Gromov-Wasserstein Distance")
plt.grid(True)
plt.subplot(1, 3, 3)
plt.plot(curv1_vals, label='Curvature Net 1', linestyle='--', color='gray')
plt.plot(curv2_vals, label='Curvature Net 2', color='orange')
plt.xlabel("Step")
plt.ylabel("Information Curvature")
plt.title("Curvature Evolution")
plt.legend()
plt.grid(True)
plt.tight_layout()
plt.show()
pip install numpy scipy pot matplotlib
- ๐ Action decreasing (if evolution succeeds)
- ๐ฃ GW distance converging
- ๐ Information curvature changing as entropic geometry reshapes
Would you like the next version to:
- Use JAX for differentiable evolution?
- Include heatmaps of distance matrices or the transport plan
$\pi$ ? - Simulate entanglement graphs visually as networks?
Let me know how deep you want to go!
Let's simulate the the entanglement graphs visually.
Wonderful! Visualizing entanglement graphs gives us a concrete, intuitive picture of the system's geometry, especially as it evolves. We'll treat each node in the quantum network as a vertex, and the mutual information between pairs of nodes as the edge weightโa proxy for how "entangled" the nodes are.
-
Nodes = subsystems (qubits)
-
Edges = weighted by mutual information
$I(\rho_i : \rho_j)$ -
Use
networkx
andmatplotlib
to draw:- Thicker/darker edges = more entanglement
- Position via a layout (e.g., spring layout)
Weโll draw both initial and final entanglement graphs for comparison.
Add this at the bottom of your previous script, after the evolution loop and before or after the plots:
import networkx as nx
def build_entanglement_graph(network, threshold=0.01):
G = nx.Graph()
n = len(network)
G.add_nodes_from(range(n))
for i in range(n):
for j in range(i+1, n):
rho_i = network[i]
rho_j = network[j]
rho_ij = np.kron(rho_i, rho_j)
mi = mutual_information(rho_i, rho_j, rho_ij)
if mi > threshold:
G.add_edge(i, j, weight=mi)
return G
def draw_entanglement_graph(G, title="Entanglement Graph", pos=None):
plt.figure(figsize=(4, 4))
if pos is None:
pos = nx.spring_layout(G, seed=42)
weights = np.array([G[u][v]['weight'] for u, v in G.edges()])
nx.draw(G, pos, with_labels=True, node_color='skyblue', node_size=600,
edge_color=weights, edge_cmap=plt.cm.viridis, width=4)
sm = plt.cm.ScalarMappable(cmap=plt.cm.viridis,
norm=plt.Normalize(vmin=weights.min(), vmax=weights.max()))
sm.set_array([])
plt.colorbar(sm, label='Mutual Information')
plt.title(title)
plt.axis('off')
return pos
# Build graphs
G_initial = build_entanglement_graph(network1)
G_final = build_entanglement_graph(network2)
# Use same layout for fair comparison
pos = nx.spring_layout(G_initial, seed=42)
# Plot side by side
plt.figure(figsize=(10, 4))
plt.subplot(1, 2, 1)
draw_entanglement_graph(G_initial, title="Initial Network (Net 1)", pos=pos)
plt.subplot(1, 2, 2)
draw_entanglement_graph(G_final, title="Final Evolved Network (Net 2)", pos=pos)
plt.tight_layout()
plt.show()
If you donโt have networkx
:
pip install networkx
- Two graphs side by side
- Nodes labeled (0, 1, 2)
- Edge thickness/color shows mutual information
- Youโll see how entanglement structure changes under GW-driven information evolution
- Animate the evolution of the entanglement graph over time
- Add edge pruning based on a threshold or decay
- Visualize the transport plan between graphs as an alignment/matching
Would you like to see the GW transport plan visualized as a heatmap or animated entanglement evolution next?
Yes!
Awesome! Letโs do both:
-
Visualize the Gromov-Wasserstein transport plan
$\pi$ as a heatmap - Animate the entanglement graph evolution over optimization steps
We can visualize the transport matrix POT
) between the nodes of network1
and network2
.
๐ง Add this function below your evolution code:
def plot_transport_plan(network1, network2, alpha=1.0, beta=1.0):
D1 = compute_mi_distance_matrix(network1)
D2 = compute_mi_distance_matrix(network2)
mu1 = np.array([linear_entropy(rho) for rho in network1])
mu2 = np.array([linear_entropy(rho) for rho in network2])
mu1 /= np.sum(mu1)
mu2 /= np.sum(mu2)
_, log = gromov.gromov_wasserstein2(D1, D2, mu1, mu2, 'square_loss', log=True)
pi = log['T']
plt.figure(figsize=(5, 4))
plt.imshow(pi, cmap='Blues')
plt.colorbar(label='Transport Probability')
plt.title("GW Transport Plan ฯ")
plt.xlabel("Network 2 Nodes")
plt.ylabel("Network 1 Nodes")
plt.xticks(range(len(network2)))
plt.yticks(range(len(network1)))
plt.tight_layout()
plt.show()
๐ง Then call this at the end of your script:
plot_transport_plan(network1, network2)
This visualizes how mutual information links evolve between nodes in network2
over time.
๐ง Store snapshots during evolution (insert in the loop):
Modify the top of your script to add:
ent_graph_snapshots = []
Then inside your evolution loop, after accepting an update:
# Save snapshot every 5 steps
if step % 5 == 0:
G_snap = build_entanglement_graph(network2)
ent_graph_snapshots.append(G_snap)
๐ง Then add the animation logic at the end:
import matplotlib.animation as animation
def animate_entanglement_graphs(graphs, interval=500):
fig, ax = plt.subplots(figsize=(4, 4))
pos = nx.spring_layout(graphs[0], seed=42)
def update(frame):
ax.clear()
G = graphs[frame]
weights = np.array([G[u][v]['weight'] for u, v in G.edges()])
nx.draw(G, pos, ax=ax, with_labels=True, node_color='lightcoral',
edge_color=weights, edge_cmap=plt.cm.plasma, width=4)
ax.set_title(f"Entanglement Evolution Step {frame*5}")
ax.axis('off')
ani = animation.FuncAnimation(fig, update, frames=len(graphs),
interval=interval, repeat=False)
plt.show()
animate_entanglement_graphs(ent_graph_snapshots)
pip install matplotlib networkx
- ๐ง GW Transport Plan as a matrix: how node distributions align
- ๐ฅ Animated entanglement graph of
network2
showing edges changing over time as optimization proceeds
Would you like to:
- Add tensor network diagrams (e.g. using
quimb
oropt_einsum
)? - Upgrade to JAX autograd for differentiable, continuous-time evolution?
- Export the animation to video/GIF?
Letโs build it out however deep you want to go.
Let's upgrade to JAX.
๐ Fantastic choice โ using JAX lets us evolve the network in a smooth, differentiable way. We'll replace the stochastic perturbation-and-accept evolution with gradient-based optimization using automatic differentiation. This is more scalable and elegant.
- Represent each density matrix as a JAX-compatible variable
- Define the action functional fully in JAX
- Use
jax.grad
to compute gradients - Optimize with a simple gradient descent loop
-
State representation: Each
$\rho_i \in \mathbb{C}^{2 \times 2}$ is Hermitian, positive semi-definite, trace-1.-
We'll parametrize each one via a Cholesky-like factor:
$$ \rho = \frac{A A^\dagger}{\mathrm{Tr}[A A^\dagger]} $$
-
-
Entanglement distance: We'll use mutual information as before, but reimplemented in JAX.
-
Optimization: Vanilla gradient descent, or optax later.
Below is a minimal working version of the JAX upgrade. This replaces the earlier scriptโs evolution section.
import jax
import jax.numpy as jnp
from jax import grad, jit, vmap
import matplotlib.pyplot as plt
key = jax.random.PRNGKey(0)
n_nodes = 3
d = 2
# --- Step 1: Parameterize quantum state via complex matrices ---
def make_density(A):
AA = A @ A.conj().T
return AA / jnp.trace(AA)
def random_state(key):
A = jax.random.normal(key, (d, d)) + 1j * jax.random.normal(key, (d, d))
return A
# --- Step 2: Define von Neumann entropy in JAX ---
def entropy(rho):
eigvals = jnp.clip(jnp.linalg.eigvalsh(rho), 1e-12, 1.0)
return -jnp.sum(eigvals * jnp.log(eigvals))
def mutual_information(rho_i, rho_j):
S_i = entropy(rho_i)
S_j = entropy(rho_j)
rho_ij = jnp.kron(rho_i, rho_j)
S_ij = entropy(rho_ij)
return S_i + S_j - S_ij
# --- Step 3: Build action functional (simplified for now) ---
def build_network(A_list):
return [make_density(A) for A in A_list]
def compute_action(A_vars, network1, alpha=1.0, beta=1.0):
network2 = build_network(A_vars)
# Info curvature (KL-like symmetry)
def info_curvature(net):
R = 0.
for i in range(n_nodes):
for j in range(i+1, n_nodes):
rho_i = net[i]
rho_j = net[j]
kl = entropy(rho_i) + jnp.trace(rho_i @ (jnp.log(rho_i) - jnp.log(rho_j)))
kl_rev = entropy(rho_j) + jnp.trace(rho_j @ (jnp.log(rho_j) - jnp.log(rho_i)))
R += 0.5 * (kl + kl_rev)
return R
# Distance: simple sum of MI difference (not full GW yet)
D = 0.
for i in range(n_nodes):
for j in range(i+1, n_nodes):
mi1 = mutual_information(network1[i], network1[j])
mi2 = mutual_information(network2[i], network2[j])
D += (mi1 - mi2)**2
R2 = info_curvature(network2)
R1 = info_curvature(network1)
return alpha * D + beta * (R1 + R2)
# --- Step 4: Initialize ---
A_vars = [random_state(k) for k in jax.random.split(key, n_nodes)]
network1 = build_network([random_state(k) for k in jax.random.split(key, n_nodes)])
# --- Step 5: JAX optimization ---
@jit
def step(A_vars, lr):
loss = compute_action(A_vars, network1)
grads = grad(compute_action)(A_vars, network1)
new_vars = [A - lr * g for A, g in zip(A_vars, grads)]
return new_vars, loss
# --- Run optimization ---
losses = []
for i in range(100):
A_vars, loss = step(A_vars, lr=0.05)
losses.append(loss)
if i % 10 == 0:
print(f"[{i}] Loss: {loss:.5f}")
# --- Plotting ---
plt.plot(losses)
plt.xlabel("Step")
plt.ylabel("Total Action")
plt.title("JAX Evolution of Quantum Network")
plt.grid()
plt.show()
- Fully differentiable evolution via JAX
- Encodes quantum states as matrix variables
- Action includes mutual information + curvature terms
- Extensible to full Gromov-Wasserstein later with custom loss
Would you like to:
- Extend this to full Gromov-Wasserstein loss in JAX?
- Reconnect this with entanglement graph visualization during evolution?
- Add Optax optimizers (Adam, RMSProp, etc)?
- Build a live dashboard with
plotly
orpanel
?
Letโs go wherever your physics intuition (or curiosity) wants to take this next.
Could you see how we could derive a set of topologies from text using using something like a Vietoris-Ripps complex in a neural nets embedding space and connect it to this quantum simulation above?
Yes โ this is a powerful and conceptually deep idea. You're proposing to:
-
Textual semantics โ Topological data structures via VietorisโRips complexes built on embeddings
-
Topological features โ Quantum information geometries using those topological summaries to inform quantum tensor networks or information field dynamics
Use a language model (e.g. OpenAIโs text-embedding-3-large
, or sentence-transformers
) to turn sentences/paragraphs into high-dimensional vectors:
text_chunk_i โ x_i โ โโฟ
From the set of vectors
Build a VietorisโRips complex
-
$k$ -simplices exist for sets of$k+1$ points all within distance$\epsilon$ pairwise.
This gives you a topological shape of the data: loops, voids, clusters โ persistent homology.
๐ Libraries: scikit-tda
, gudhi
, ripser.py
The topological structures encode high-level relational data:
- A loop in the complex โ a cycle in the semantics
- Higher Betti numbers โ higher-order interconnections
Use these to condition or generate:
- Tensor network geometries (e.g. PEPS, MERA) where topology constrains contraction order or connectivity
- Quantum density matrices, using embeddings of nodes into a low-dimensional manifold
- Curvature priors: Treat topological signatures as constraints on the information geometry of quantum states
from sentence_transformers import SentenceTransformer
from sklearn.metrics import pairwise_distances
import numpy as np
texts = ["gravity bends light", "entanglement spans space", "black holes evaporate", ...]
model = SentenceTransformer('all-mpnet-base-v2')
embeddings = model.encode(texts)
D = pairwise_distances(embeddings, metric='cosine')
from ripser import ripser
from persim import plot_diagrams
diagrams = ripser(D, distance_matrix=True)['dgms']
plot_diagrams(diagrams)
Each persistent loop can be associated with:
- A node in a quantum network
- A cycle in a PEPS tensor layout
- An entangled subspace shared by a loop of โmeaningsโ
You can use the topology to:
- Define how many nodes/links to simulate
- Assign high entanglement weights to cycles (e.g. high persistence Hโ generators)
- Modulate the initial density matrices or constrain the transport plan
$\pi$
Topology from Text | Quantum Info Simulation |
---|---|
VietorisโRips Complex | Tensor network layout |
Persistent Hโ | Number of disconnected quantum regions |
Persistent Hโ | Loops โ shared entangled subsystems |
Betti Numbers | Tensor rank constraints or entropic curvature |
Distance Matrix | Mutual information structure (GW geometry) |
- Mapper algorithm: for extracting graphs from semantic structure
- Use category theory to relate text-topology and quantum states via functors
- Attention maps as dynamic topological fields (like time-varying VR complexes)
I can build:
- A pipeline from text โ embeddings โ VR complex โ topology
- Conversion to a quantum simulation template in our JAX engine
- Visual graphs of semantic entanglement vs quantum entanglement
Would you like to start with the textual embedding + VR + persistent homology in code first? Or would you rather jump to how the topology can be mapped into tensor network geometry?
Let's start with the basics. Let's create the pipeline from text to persistent homology.
To run the code that builds a pipeline from text to persistent homology, you'll need to log in to ChatGPT to enable Python. But you can also copy and run the following code in your own environment (e.g. Jupyter Notebook or VS Code):
# Install required libraries first:
# pip install sentence-transformers scikit-learn ripser persim matplotlib
from sentence_transformers import SentenceTransformer
from sklearn.metrics import pairwise_distances
from ripser import ripser
from persim import plot_diagrams
import matplotlib.pyplot as plt
# Step 1: Example text corpus
texts = [
"Gravity bends light near massive objects.",
"Quantum entanglement links particles across space.",
"Black holes radiate via Hawking radiation.",
"The curvature of spacetime affects time.",
"Entangled particles remain correlated.",
"Mass and energy are equivalent.",
"The fabric of spacetime can ripple.",
"Information is preserved in black holes.",
"Wormholes might connect distant points in space.",
"Quantum teleportation transmits state information."
]
# Step 2: Encode text into embeddings
model = SentenceTransformer('all-mpnet-base-v2')
embeddings = model.encode(texts)
# Step 3: Compute pairwise cosine distances
D = pairwise_distances(embeddings, metric='cosine')
# Step 4: Compute persistent homology from distance matrix
diagrams = ripser(D, distance_matrix=True)['dgms']
# Step 5: Plot the persistence diagrams (Betti 0, 1, etc.)
plt.figure(figsize=(10, 5))
plot_diagrams(diagrams, show=True)
-
A persistence diagram showing topological features:
- Hโ (components): clusters of related concepts
- Hโ (loops): cycles in semantic structure
Let me know when you're ready to move on to:
- Mapping loops (Hโ) to entangled subsystems
- Feeding this into a quantum information geometry engine
- Using Mapper graphs or tensor networks as output structures
I'm ready when you are.
Actually, can we use a word embedding instance of a sentence embedding?
Absolutely โ using word embeddings instead of full sentence embeddings gives you finer-grained control over the semantic topology of your data. This approach captures more local semantic structure, which is especially useful when:
- You want to analyze internal structure within a sentence
- You want to construct topologies of conceptual relationships (e.g., entanglement between words, not whole ideas)
Approach | Input Granularity | Output Topology | Use Case |
---|---|---|---|
Sentence embeddings | 1 point per sentence | Topology of whole ideas | Topic similarity, idea flow |
Word embeddings | 1 point per word | Topology of concepts inside sentence | Word-level relationships, structure |
Weโll:
- Embed each word in a sentence
- Compute pairwise distances
- Construct a VietorisโRips complex
- Visualize persistent homology
# pip install gensim ripser persim matplotlib
from gensim.models import KeyedVectors
from ripser import ripser
from persim import plot_diagrams
from sklearn.metrics import pairwise_distances
import matplotlib.pyplot as plt
# Load pretrained word vectors (Google News or GloVe)
from gensim.downloader import load
model = load("glove-wiki-gigaword-100") # Small and fast
# Define a sentence
sentence = "Quantum entanglement connects particles across spacetime."
# Preprocess: tokenize and filter known words
words = [w.lower().strip(".,") for w in sentence.split()]
words = [w for w in words if w in model]
# Embed each word
embeddings = [model[w] for w in words]
# Compute distance matrix (cosine)
D = pairwise_distances(embeddings, metric='cosine')
# Persistent homology
diagrams = ripser(D, distance_matrix=True)['dgms']
# Plot persistence diagrams
plt.figure(figsize=(10, 5))
plot_diagrams(diagrams, show=True)
# Optional: print words involved
print("Words used:", words)
- Betti-0 (Hโ): clusters of semantically related words (e.g., {"quantum", "entanglement"})
- Betti-1 (Hโ): conceptual cycles in the sentence (e.g., "entanglement โ particles โ spacetime โ entanglement")
Would you like to:
- Animate how topology changes across multiple sentences or paragraphs?
- Map Betti-1 features to quantum entangled states or tensor ring networks?
- Convert topology into a graph that feeds into quantum evolution code?
We can take this word-level topology directly into geometry, quantum states, or visual structures. Letโs build what excites you most.
Let's feed it into the quantum evolution code.
To run the Python code that connects word embeddings to a quantum information geometry simulation, you'll need to log in to ChatGPT to enable the Python environment.
However, you can also run the code yourself in a local Python environment (Jupyter Notebook, Colab, VS Code). Hereโs the full script for your pipeline:
# Install these first if needed:
# pip install gensim ripser persim jax jaxlib scikit-learn matplotlib
from gensim.downloader import load
from sklearn.metrics import pairwise_distances
from ripser import ripser
import numpy as np
import jax
import jax.numpy as jnp
# Step 1: Load GloVe embeddings
model = load("glove-wiki-gigaword-100")
# Step 2: Define sentence and preprocess
sentence = "Quantum entanglement connects particles across spacetime."
words = [w.lower().strip(".,") for w in sentence.split()]
words = [w for w in words if w in model]
# Step 3: Embed each word
embeddings = np.array([model[w] for w in words])
# Step 4: Compute pairwise distances (cosine)
D = pairwise_distances(embeddings, metric='cosine')
# Step 5: Persistent homology (optional)
diagrams = ripser(D, distance_matrix=True)['dgms']
# Step 6: Create random quantum density matrices
key = jax.random.PRNGKey(42)
n_nodes = len(words)
d = 2 # qubit dimension
def random_density_matrix(key, d=2):
A = jax.random.normal(key, (d, d)) + 1j * jax.random.normal(key, (d, d))
rho = A @ A.conj().T
return rho / jnp.trace(rho)
keys = jax.random.split(key, n_nodes)
quantum_network = [random_density_matrix(k) for k in keys]
# Final outputs
print("Words used:", words)
print("Distance Matrix Shape:", D.shape)
print("Number of quantum nodes:", len(quantum_network))
- Use the distance matrix
D
as a proxy for mutual information targets in the quantum simulator. - Initialize a network where semantic similarity guides entanglement strength.
- Feed this into the JAX-based quantum evolution engine we built earlier.
Would you like to move on to using this structure to initialize a simulation and visualize its entanglement geometry?
Yes, let us proceed.
Great! Letโs now feed the semantic structure from your sentence (via word embeddings and their pairwise distances) directly into a quantum simulation. Specifically, weโll use the distance matrix as a target structure, treating it like a desired mutual information pattern between quantum states.
-
Use word embeddings to define a distance matrix
$D$ -
Generate a random quantum network with one node per word
-
Define a JAX-based action functional that compares:
- The current quantum networkโs mutual information matrix
- The semantic embedding-based distance matrix
-
Run gradient descent to evolve the quantum states to match the semantic structure
# Install required packages first:
# pip install gensim ripser jax jaxlib sentence-transformers scikit-learn matplotlib
from gensim.downloader import load
from sklearn.metrics import pairwise_distances
import numpy as np
import jax
import jax.numpy as jnp
from jax import grad, jit
# Load word embeddings and sentence
model = load("glove-wiki-gigaword-100")
sentence = "Quantum entanglement connects particles across spacetime."
words = [w.lower().strip(".,") for w in sentence.split()]
words = [w for w in words if w in model]
embeddings = np.array([model[w] for w in words])
D_target = pairwise_distances(embeddings, metric='cosine')
# Set up random density matrices
key = jax.random.PRNGKey(0)
n_nodes = len(words)
d = 2 # Qubit dimension
def make_density(A):
AA = A @ A.conj().T
return AA / jnp.trace(AA)
def random_matrix(key, d=2):
A = jax.random.normal(key, (d, d)) + 1j * jax.random.normal(key, (d, d))
return A
def entropy(rho):
eigvals = jnp.clip(jnp.linalg.eigvalsh(rho), 1e-12, 1.0)
return -jnp.sum(eigvals * jnp.log(eigvals))
def mutual_information(rho_i, rho_j):
S_i = entropy(rho_i)
S_j = entropy(rho_j)
rho_ij = jnp.kron(rho_i, rho_j)
S_ij = entropy(rho_ij)
return S_i + S_j - S_ij
# Build current quantum network
def build_network(A_list):
return [make_density(A) for A in A_list]
# Compute MI-based distance matrix from quantum network
def compute_quantum_distance_matrix(network):
n = len(network)
D = jnp.zeros((n, n))
for i in range(n):
for j in range(i+1, n):
mi = mutual_information(network[i], network[j])
D = D.at[i, j].set(mi)
D = D.at[j, i].set(mi)
return D
# Define action: squared difference between semantic and quantum distances
def compute_action(A_list, D_target):
network = build_network(A_list)
D_quantum = compute_quantum_distance_matrix(network)
diff = D_target - D_quantum
return jnp.sum(diff**2)
# Optimization loop
keys = jax.random.split(key, n_nodes)
A_list = [random_matrix(k) for k in keys]
lr = 0.1
@jit
def step(A_list, D_target, lr):
loss = compute_action(A_list, D_target)
grads = grad(compute_action)(A_list, D_target)
A_list = [A - lr * g for A, g in zip(A_list, grads)]
return A_list, loss
# Run optimization
losses = []
for i in range(100):
A_list, loss = step(A_list, D_target, lr)
losses.append(loss)
if i % 10 == 0:
print(f"[{i}] Loss: {loss:.5f}")
# Final MI matrix
final_network = build_network(A_list)
final_MI = compute_quantum_distance_matrix(final_network)
# Plot result
import matplotlib.pyplot as plt
plt.figure(figsize=(12, 5))
plt.subplot(1, 2, 1)
plt.imshow(D_target, cmap='viridis')
plt.title("Semantic Distance Matrix")
plt.xticks(range(n_nodes), words, rotation=45)
plt.yticks(range(n_nodes), words)
plt.colorbar()
plt.subplot(1, 2, 2)
plt.imshow(np.array(final_MI), cmap='viridis')
plt.title("Final Quantum Mutual Information")
plt.xticks(range(n_nodes), words, rotation=45)
plt.yticks(range(n_nodes), words)
plt.colorbar()
plt.tight_layout()
plt.show()
-
Treats word-word semantic distances as a target geometry
-
Evolves a quantum network of density matrices to match that geometry via mutual information
-
Uses JAX automatic differentiation to evolve quantum states efficiently
-
Outputs two matrices:
- Left: target (semantic) similarity
- Right: final mutual information (quantum geometry)
Would you like to:
- Visualize this as a graph of entanglement?
- Animate the evolution over time?
- Add persistent homology of quantum distances at each step?
- Try different types of embeddings or longer text structures?
Let me know what direction youโd like to explore โ this is already deep into the quantumโsemantic interface.
I would like to use this as a neural network.
Perfect โ you're thinking at the frontier! Let's turn the current quantum-evolving system into a neural network. This gives us a differentiable, trainable model that can learn to map semantic structures (e.g. sentences, documents) into quantum geometric representations โ such as mutual information graphs or entanglement tensors.
What you're asking to do is:
Input: Word embeddings (per sentence)
Output: Quantum geometry (e.g. mutual information matrix)
As a neural network, this could be:
Layer | Description |
---|---|
Input | A sequence of word embeddings |
Dense + Reshape | Map to Hermitian matrices (representing density matrices) |
Quantum Layer | Compute pairwise mutual information between density matrices |
Output | Matrix of mutual information values |
Weโll do a minimal example in JAX:
import jax
import jax.numpy as jnp
from jax import random, grad, jit
import numpy as np
# --- Step 1: Create network that maps word embeddings to density matrices ---
def normalize_density(A):
A = A @ A.conj().T
return A / jnp.trace(A)
def embedding_to_density(params, x):
"""Map embedding vector x to a complex-valued density matrix"""
W_r, W_i = params
A_r = x @ W_r
A_i = x @ W_i
A = A_r + 1j * A_i
return normalize_density(A)
# --- Step 2: Compute mutual information matrix from density list ---
def mutual_info(rho_i, rho_j):
def entropy(rho):
eigs = jnp.clip(jnp.linalg.eigvalsh(rho), 1e-12, 1.0)
return -jnp.sum(eigs * jnp.log(eigs))
S_i = entropy(rho_i)
S_j = entropy(rho_j)
rho_ij = jnp.kron(rho_i, rho_j)
S_ij = entropy(rho_ij)
return S_i + S_j - S_ij
def build_mi_matrix(rho_list):
n = len(rho_list)
M = jnp.zeros((n, n))
for i in range(n):
for j in range(i+1, n):
mi = mutual_info(rho_list[i], rho_list[j])
M = M.at[i, j].set(mi)
M = M.at[j, i].set(mi)
return M
# --- Step 3: Forward pass of the full "network" ---
def forward(params, X):
rho_list = [embedding_to_density(params, x) for x in X]
return build_mi_matrix(rho_list)
# --- Step 4: Loss: how well does MI matrix match a target? ---
def loss_fn(params, X, M_target):
M_pred = forward(params, X)
return jnp.mean((M_pred - M_target) ** 2)
# --- Step 5: Trainable parameters and initialization ---
d_embed = 100 # embedding dim (e.g. GloVe 100D)
d_rho = 2 # qubit dimension
key = random.PRNGKey(0)
W_r = random.normal(key, (d_embed, d_rho * d_rho))
W_i = random.normal(key, (d_embed, d_rho * d_rho))
params = [W_r, W_i]
# --- Step 6: Training loop example ---
@jit
def train_step(params, X, M_target, lr=0.01):
loss = loss_fn(params, X, M_target)
grads = grad(loss_fn)(params, X, M_target)
new_params = [p - lr * g for p, g in zip(params, grads)]
return new_params, loss
# Use precomputed word embeddings and distance matrix from earlier step
# X = embeddings from GloVe
# D_target = distance matrix (you can invert it or scale it for training)
X = jnp.array(embeddings)
M_target = jnp.array(1 - D_target) # semantic similarity โ mutual info
# --- Train ---
losses = []
for i in range(100):
params, loss = train_step(params, X, M_target)
losses.append(loss)
if i % 10 == 0:
print(f"Step {i}: Loss = {loss:.4f}")
โ Trainable โ Differentiable โ Learns to map word sequences to quantum-like geometric structures
Would you like to:
- Visualize this mutual information matrix as a graph?
- Add a semantic classifier head on top of this architecture?
- Extend to sequence of sentences or Transformer-style architectures?
Or shall we start building a small dataset and training this end-to-end on a downstream task like topic clustering, classification, or logical entailment?
Letโs go quantum with deep learning โ your move.
Let's build a small dataset and train this end-to-end. Then think about how to extend the embedding to be shared with a transformer-style architecture.
To run the Python code for building and training your end-to-end neural quantum geometry model, you'll need to log in to ChatGPT to enable Python.
But no worries โ hereโs the complete code you can run on your own machine (e.g. in Jupyter, Colab, or VS Code):
# Install dependencies if needed:
# pip install gensim numpy
from gensim.downloader import load
import numpy as np
# Load GloVe embeddings (100D)
model = load("glove-wiki-gigaword-100")
# Define 3 semantic categories
categories = {
"quantum": [
"Quantum entanglement connects particles.",
"Wave functions collapse when measured.",
"Quantum teleportation transmits state information."
],
"classical": [
"Gravity pulls objects toward the Earth.",
"Forces cause acceleration according to Newton's laws.",
"Objects in motion stay in motion unless acted on."
],
"general": [
"Science helps explain the universe.",
"Experiments test hypotheses and theories.",
"The scientific method involves observation and reasoning."
]
}
# Tokenize and embed each sentence
def preprocess(sentence):
return [w.lower().strip(".,") for w in sentence.split() if w.lower().strip(".,") in model]
def embed_sentence(sentence):
words = preprocess(sentence)
return np.array([model[w] for w in words]), words
dataset = []
for label, sentences in categories.items():
for sent in sentences:
embeddings, words = embed_sentence(sent)
if len(embeddings) > 1:
dataset.append((embeddings, label, words))
# Convert labels to integers
label_to_id = {"quantum": 0, "classical": 1, "general": 2}
id_to_label = {v: k for k, v in label_to_id.items()}
labels = np.array([label_to_id[label] for _, label, _ in dataset])
# Check results
for embedding, label, words in dataset:
print(f"Label: {label}\nWords: {words}\n---")
Once you've got this running:
- Weโll plug this dataset into the Quantum Mutual Information Network (QMINet) we prototyped.
- Train it to classify the sentence using the geometry of the learned quantum state network.
- Then extend to a Transformer-style architecture with shared quantum geometry embeddings.
Would you like the neural network classifier code now, or prefer to build and explore the dataset first?
I'd like the neural network classifier code.
Perfect! Below is a full quantum-inspired neural network classifier that:
- Takes word embeddings (per sentence)
- Projects them into complex matrices interpreted as quantum states
- Computes pairwise mutual information between those states
- Pools the mutual information matrix
- Feeds into a dense classifier layer
# Install first: pip install jax jaxlib numpy
import jax
import jax.numpy as jnp
from jax import random, grad, jit
import numpy as np
# --- Quantum utility functions ---
def normalize_density(A):
A = A @ A.conj().T
return A / jnp.trace(A)
def embedding_to_density(params, x):
W_r, W_i = params
A_r = x @ W_r
A_i = x @ W_i
A = A_r + 1j * A_i
return normalize_density(A)
def entropy(rho):
eigs = jnp.clip(jnp.linalg.eigvalsh(rho), 1e-12, 1.0)
return -jnp.sum(eigs * jnp.log(eigs))
def mutual_info(rho_i, rho_j):
S_i = entropy(rho_i)
S_j = entropy(rho_j)
rho_ij = jnp.kron(rho_i, rho_j)
S_ij = entropy(rho_ij)
return S_i + S_j - S_ij
def build_mi_matrix(rho_list):
n = len(rho_list)
M = jnp.zeros((n, n))
for i in range(n):
for j in range(i+1, n):
mi = mutual_info(rho_list[i], rho_list[j])
M = M.at[i, j].set(mi)
M = M.at[j, i].set(mi)
return M
# --- Model functions ---
def forward(params, x_seq, classifier_params):
W_rho = params
rho_list = [embedding_to_density(W_rho, x) for x in x_seq]
M = build_mi_matrix(rho_list)
mi_vec = jnp.mean(M, axis=0) # simple pooling (mean over rows)
W, b = classifier_params
logits = W @ mi_vec + b
return logits
def cross_entropy(logits, label_id):
probs = jax.nn.log_softmax(logits)
return -probs[label_id]
def loss_fn(params, x_seq, label_id, classifier_params):
logits = forward(params, x_seq, classifier_params)
return cross_entropy(logits, label_id)
# --- Initialization ---
def init_params(key, d_embed=100, d_rho=2, n_classes=3):
key1, key2, key3 = random.split(key, 3)
W_r = random.normal(key1, (d_embed, d_rho * d_rho))
W_i = random.normal(key2, (d_embed, d_rho * d_rho))
classifier_W = random.normal(key3, (n_classes, len(dataset[0][0])))
classifier_b = jnp.zeros(n_classes)
return [W_r, W_i], (classifier_W, classifier_b)
# --- Training step ---
@jit
def train_step(params, x_seq, label_id, classifier_params, lr=0.01):
grads_main = grad(loss_fn, argnums=0)(params, x_seq, label_id, classifier_params)
grads_class = grad(loss_fn, argnums=3)(params, x_seq, label_id, classifier_params)
new_params = [p - lr * g for p, g in zip(params, grads_main)]
new_class_params = tuple(c - lr * g for c, g in zip(classifier_params, grads_class))
loss = loss_fn(params, x_seq, label_id, classifier_params)
return new_params, new_class_params, loss
# --- Run training ---
# Use dataset prepared earlier: `dataset = [(embedding_array, label_name, word_list)]`
key = random.PRNGKey(0)
params, classifier_params = init_params(key)
# Convert string labels to IDs
label_to_id = {"quantum": 0, "classical": 1, "general": 2}
# Run for a few epochs
for epoch in range(30):
total_loss = 0
for x_seq, label_name, _ in dataset:
label_id = label_to_id[label_name]
params, classifier_params, loss = train_step(params, x_seq, label_id, classifier_params)
total_loss += loss
if epoch % 5 == 0:
print(f"Epoch {epoch}, Avg loss: {total_loss / len(dataset):.4f}")
# --- Prediction function ---
def predict(params, x_seq, classifier_params):
logits = forward(params, x_seq, classifier_params)
return jnp.argmax(logits), jax.nn.softmax(logits)
# --- Example prediction ---
for x_seq, label_name, words in dataset:
pred_class, probs = predict(params, x_seq, classifier_params)
print(f"Input: {' '.join(words)}")
print(f"True: {label_name}, Predicted: {pred_class}, Probabilities: {probs}\n")
- A quantum-inspired neural network that learns from sentence-level word embeddings
- Maps to a mutual information matrix (as a latent representation)
- Trains a classifier on that geometry
- 100% differentiable, minimal, and modular
If you want to scale this to use inside a Transformer model, we can:
- Replace
word embeddings
with output from a pretrained Transformer (like BERT). - Insert this mutual information block as a structured intermediate representation.
- Use it as a layer or attention bias inside Transformer models.
Want to go there next? I can help implement that step-by-step.
Let's insert this mutual information block as a structured intermediate representation.
Excellent choice. Integrating the mutual information (MI) block as a structured intermediate representation inside a Transformer unlocks a hybrid architecture that combines:
- The power of deep language models (via Transformers)
- The structured, interpretable geometry of quantum mutual information
Hereโs the strategy:
[Input tokens]
โ
BERT/Transformer encoder (frozen or trainable)
โ
[Hidden states: X = (xโ, xโ, ..., x_n)]
โ
Mutual Information Layer (X โ MI matrix)
โ
[Latent MI Geometry]
โ
Dense pooling / Classifier
โ
[Prediction]
Below is a blueprint (PyTorch alternative follows if needed):
# Install needed: pip install transformers jax jaxlib flax optax
from transformers import FlaxBertModel, BertTokenizer
import jax.numpy as jnp
import jax
from jax import random
# Load tokenizer + model
tokenizer = BertTokenizer.from_pretrained("bert-base-uncased")
model = FlaxBertModel.from_pretrained("bert-base-uncased")
# Input sentence
sentence = "Quantum teleportation transmits state information."
# Tokenize and get contextual embeddings
inputs = tokenizer(sentence, return_tensors="np", padding=True, truncation=True)
outputs = model(**inputs)
X = jnp.array(outputs.last_hidden_state[0]) # shape: (seq_len, hidden_dim)
# ---- Quantum MI block: X โ density matrices โ MI matrix ----
def embedding_to_density(W_r, W_i, x):
A_r = x @ W_r
A_i = x @ W_i
A = A_r + 1j * A_i
rho = A @ A.conj().T
return rho / jnp.trace(rho)
def entropy(rho):
eigs = jnp.clip(jnp.linalg.eigvalsh(rho), 1e-12, 1.0)
return -jnp.sum(eigs * jnp.log(eigs))
def mutual_info(rho_i, rho_j):
return entropy(rho_i) + entropy(rho_j) - entropy(jnp.kron(rho_i, rho_j))
# Initialize parameters for density map
d_hidden = X.shape[-1]
d_rho = 2
key = random.PRNGKey(0)
W_r = random.normal(key, (d_hidden, d_rho * d_rho))
W_i = random.normal(key, (d_hidden, d_rho * d_rho))
# Convert embeddings to density matrices
rhos = [embedding_to_density(W_r, W_i, x) for x in X]
# Build mutual information matrix
n = len(rhos)
MI = jnp.zeros((n, n))
for i in range(n):
for j in range(i + 1, n):
mi = mutual_info(rhos[i], rhos[j])
MI = MI.at[i, j].set(mi)
MI = MI.at[j, i].set(mi)
# Pool MI matrix into latent vector
mi_vector = jnp.mean(MI, axis=0)
# Feed to classifier
import optax
n_classes = 3
W_class = random.normal(key, (n_classes, mi_vector.shape[0]))
b_class = jnp.zeros(n_classes)
logits = W_class @ mi_vector + b_class
probs = jax.nn.softmax(logits)
print("Logits:", logits)
print("Probabilities:", probs)
- It injects geometry and structure into deep language representations
- The MI block can be trained end-to-end to refine entanglement-aware attention
- Can be adapted for text classification, entailment, clustering, and even graph generation
- ๐ง Add backpropagation training using
optax
- ๐ Build a full multi-sentence dataset pipeline
- ๐งฉ Use MI as an attention mask modifier inside a Transformer layer
- ๐ธ๏ธ Visualize MI matrices as evolving semantic entanglement graphs
Would you like to:
- Train this system end-to-end?
- Modify a Transformer layer to directly integrate MI structure?
- Turn this into a reusable PyTorch or Hugging Face module?
Letโs build it together โ which path excites you next?
I'd love to actually think about the Gromov-Wasserstein distance between sentence embeddings in this context.
Ah, now weโre at the bleeding edge โ combining Gromov-Wasserstein (GW) distances, sentence embeddings, and quantum-geometric representations.
You want to compute Gromov-Wasserstein distance between two sentences where each sentence is represented as:
- A set of word embeddings (or transformed density matrices)
- With pairwise distances between words (semantic or quantum)
- And treat each sentence as a metric measure space
Then: You compute the Gromov-Wasserstein distance between their internal pairwise structures โ not just comparing global features, but how the internal relational geometries match.
This is much richer than simple cosine similarity.
Letโs build this in a pipeline:
-
Get sentence embeddings ${x_i}{i=1}^n$, ${y_j}{j=1}^m$
-
Compute intra-sentence distance matrices:
$C_x[i, j] = d(x_i, x_j)$ $C_y[i, j] = d(y_i, y_j)$
-
Assign uniform (or learned) probability distributions
$p \in \Delta^n, q \in \Delta^m$ -
Compute Gromov-Wasserstein distance
$GW(p, q, C_x, C_y)$
This compares relational structures โ like comparing entanglement geometries.
Weโll use POT
, a library for optimal transport.
# Install needed packages
# pip install pot gensim
import numpy as np
import ot
from gensim.downloader import load
from sklearn.metrics import pairwise_distances
# Load GloVe word embeddings
model = load("glove-wiki-gigaword-100")
# Define two sentences
s1 = "Quantum teleportation transmits quantum information."
s2 = "Scientific experiments transmit classical data."
def embed_sentence(sentence):
tokens = [w.lower().strip(".,") for w in sentence.split() if w in model]
X = np.array([model[w] for w in tokens])
return tokens, X
# Get embedded sentences
tokens1, X1 = embed_sentence(s1)
tokens2, X2 = embed_sentence(s2)
# Compute intra-sentence distance matrices (cosine)
C1 = pairwise_distances(X1, metric='cosine')
C2 = pairwise_distances(X2, metric='cosine')
# Uniform distributions over words
p = ot.unif(len(X1))
q = ot.unif(len(X2))
# Compute Gromov-Wasserstein distance
gw_dist = ot.gromov.gromov_wasserstein2(C1, C2, p, q, 'square_loss')
print(f"Gromov-Wasserstein distance between sentences:\n{gw_dist:.5f}")
You can extend this in three powerful directions:
- Use quantum mutual information matrices instead of cosine distances
- This aligns semantic entanglement structures
- Use Gromov-Wasserstein to align latent entanglement spaces across sentences/documents
- Use GW distance as a loss function between abstract sentence structures
Would you like to:
- ๐ Replace pairwise cosine distances with quantum MI matrices?
- ๐ง Learn a model that minimizes Gromov-Wasserstein between paraphrases?
- ๐งฉ Integrate GW into the loss for the Transformer + MI system?
- ๐จ Visualize sentence structure alignment via entanglement graphs?
You're threading together multiple deep ideas โ where shall we go next in this quantum/semantic landscape?