Optimal sampling of dynamical large deviations in two dimensions via tensor networks

L Causer, MC Bañuls, JP Garrahan - Physical Review Letters, 2023 - APS
We use projected entangled-pair states (PEPS) to calculate the large deviation statistics of
the dynamical activity of the two-dimensional East model, and the two-dimensional …

Entanglement transitions in unitary circuit games

R Morral-Yepes, A Smith, SL Sondhi, F Pollmann - PRX Quantum, 2024 - APS
Repeated projective measurements in unitary circuits can lead to an entanglement phase
transition as the measurement rate is tuned. In this work, we consider a different setting in …

Combining Reinforcement Learning and Tensor Networks, with an Application to Dynamical Large Deviations

E Gillman, DC Rose, JP Garrahan - Physical Review Letters, 2024 - APS
We present a framework to integrate tensor network (TN) methods with reinforcement
learning (RL) for solving dynamical optimization tasks. We consider the RL actor-critic …

The frustration-free fully packed loop model

Z Zhang, HS Røising - Journal of Physics A: Mathematical and …, 2023 - iopscience.iop.org
We consider a quantum fully packed loop model on the square lattice with a frustration-free
projector Hamiltonian and ring-exchange interactions acting on plaquettes. A boundary …

Coupled Fredkin and Motzkin chains from quantum six-and nineteen-vertex models

Z Zhang, I Klich - SciPost Physics, 2023 - scipost.org
We generalize the area-law violating models of Fredkin and Motzkin spin chains into two
dimensions by building quantum six-and nineteen-vertex models with correlated …

Deformed Fredkin model for the Moore-Read state on thin cylinders

C Voinea, S Pu, A Kirmani, P Ghaemi, A Rahmani… - Physical Review …, 2024 - APS
We propose a frustration-free model for the Moore-Read quantum Hall state on sufficiently
thin cylinders with circumferences≲ 7 magnetic lengths. While the Moore-Read Hamiltonian …

Discrete generative diffusion models without stochastic differential equations: a tensor network approach

L Causer, GM Rotskoff, JP Garrahan - arXiv preprint arXiv:2407.11133, 2024 - arxiv.org
Diffusion models (DMs) are a class of generative machine learning methods that sample a
target distribution by transforming samples of a trivial (often Gaussian) distribution using a …

Ergodic Archimedean dimers

HS Røising, Z Zhang - SciPost Physics Core, 2023 - scipost.org
We study perfect matchings, or close-packed dimer coverings, of finite sections of the eleven
Archimedean lattices and give a constructive proof showing that any two perfect matchings …

Fredkin Staircase: An Integrable System with a Finite-Frequency Drude Peak

H Singh, R Vasseur, S Gopalakrishnan - Physical review letters, 2023 - APS
We introduce and explore an interacting integrable cellular automaton, the Fredkin
staircase, that lies outside the existing classification of such automata, and has a structure …

Quantum many-body scars and non-thermal behaviour in Fredkin spin chains

L Causer, MC Bañuls, JP Garrahan - arXiv preprint arXiv:2403.03986, 2024 - arxiv.org
We study the dynamics and thermalization of the Fredkin spin chain, a system with local
three-body interactions, particle conservation and explicit kinetic constraints. We consider …