Professor JUAN GARRAHAN's Outputs (7)

Exact results on the dynamics of the stochastic Floquet-East model (2024)
Journal Article
De Fazio, C., Garrahan, J. P., & Klobas, K. (2024). Exact results on the dynamics of the stochastic Floquet-East model. Journal of Physics A: Mathematical and Theoretical, 57(50), Article 505002. https://doi.org/10.1088/1751-8121/ad8e1c

We introduce a stochastic generalisation of the classical deterministic Floquet-East model, a discrete circuit with the same kinetic constraint as the East model of glasses. We prove exactly that, in the limit of long time and large size, this model... Read More about Exact results on the dynamics of the stochastic Floquet-East model.

Nonthermal eigenstates and slow relaxation in quantum Fredkin spin chains (2024)
Journal Article
Causer, L., Bañuls, M. C., & Garrahan, J. P. (2024). Nonthermal eigenstates and slow relaxation in quantum Fredkin spin chains. Physical Review B, 110(13), Article 134322. https://doi.org/10.1103/physrevb.110.134322

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 deformations away from its stochastic point in order to tune between... Read More about Nonthermal eigenstates and slow relaxation in quantum Fredkin spin chains.

Exact pretransition effects in kinetically constrained circuits: Dynamical fluctuations in the Floquet-East model (2024)
Journal Article
Klobas, K., De Fazio, C., & Garrahan, J. P. (2024). Exact pretransition effects in kinetically constrained circuits: Dynamical fluctuations in the Floquet-East model. Physical Review E, 110(2), Article L022101. https://doi.org/10.1103/physreve.110.l022101

We study the dynamics of a classical circuit corresponding to a discrete-time version of the kinetically constrained East model. We show that this classical "Floquet-East" model displays pre-transition behavior which is a dynamical equivalent of the... Read More about Exact pretransition effects in kinetically constrained circuits: Dynamical fluctuations in the Floquet-East model.

Combining Reinforcement Learning and Tensor Networks, with an Application to Dynamical Large Deviations (2024)
Journal Article
Gillman, E., Rose, D. C., & Garrahan, J. P. (2024). Combining Reinforcement Learning and Tensor Networks, with an Application to Dynamical Large Deviations. Physical Review Letters, 132(19), Article 197301. https://doi.org/10.1103/PhysRevLett.132.197301

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 method, a model-free approach for solving RL problems, and introduce TNs as the... Read More about Combining Reinforcement Learning and Tensor Networks, with an Application to Dynamical Large Deviations.

Universal and nonuniversal probability laws in Markovian open quantum dynamics subject to generalized reset processes (2024)
Journal Article
Carollo, F., Lesanovsky, I., & Garrahan, J. P. (2024). Universal and nonuniversal probability laws in Markovian open quantum dynamics subject to generalized reset processes. Physical Review E, 109(4), Article 044129. https://doi.org/10.1103/physreve.109.044129

We consider quantum-jump trajectories of Markovian open quantum systems subject to stochastic in time resets of their state to an initial configuration. The reset events provide a partitioning of quantum trajectories into consecutive time intervals,... Read More about Universal and nonuniversal probability laws in Markovian open quantum dynamics subject to generalized reset processes.

Topological phases in the dynamics of the simple exclusion process (2024)
Journal Article
Garrahan, J. P., & Pollmann, F. (2024). Topological phases in the dynamics of the simple exclusion process. Physical Review E, 109(3), Article L032105. https://doi.org/10.1103/PhysRevE.109.L032105

We study the dynamical large deviations of the classical stochastic symmetric simple exclusion process (SSEP) by means of numerical matrix product states. We show that for half-filling, long-time trajectories with a large enough imbalance between the... Read More about Topological phases in the dynamics of the simple exclusion process.

Rejection-free quantum Monte Carlo in continuous time from transition path sampling (2024)
Journal Article
Causer, L., Sfairopoulos, K., Mair, J. F., & Garrahan, J. P. (2024). Rejection-free quantum Monte Carlo in continuous time from transition path sampling. Physical Review B, 109(2), Article 024307. https://doi.org/10.1103/physrevb.109.024307

Continuous-time quantum Monte Carlo refers to a class of algorithms designed to sample the thermal distribution of a quantum Hamiltonian through exact expansions of the Boltzmann exponential in terms of stochastic trajectories which are periodic in i... Read More about Rejection-free quantum Monte Carlo in continuous time from transition path sampling.