Emergence of fluctuating hydrodynamics in chaotic quantum systems

JF Wienand, S Karch, A Impertro, C Schweizer… - Nature Physics, 2024 - nature.com
A fundamental principle of chaotic quantum dynamics is that local subsystems eventually
approach a thermal equilibrium state. The corresponding timescales increase with …

Exact solution of the macroscopic fluctuation theory for the symmetric exclusion process

K Mallick, H Moriya, T Sasamoto - Physical Review Letters, 2022 - APS
We present the first exact solution for the time-dependent equations of the macroscopic
fluctuation theory (MFT) for the symmetric simple exclusion process by combining a …

New Classical Integrable Systems from Generalized -Deformations

B Doyon, F Hübner, T Yoshimura - Physical Review Letters, 2024 - APS
We introduce and study a novel class of classical integrable many-body systems obtained
by generalized TT¯ deformations of free particles. Deformation terms are bilinears in …

Full counting statistics of charge in chaotic many-body quantum systems

E McCulloch, J De Nardis, S Gopalakrishnan… - Physical review …, 2023 - APS
We investigate the full counting statistics of charge transport in U (1)-symmetric random
unitary circuits. We consider an initial mixed state prepared with a chemical potential …

Dynamics of charge fluctuations from asymmetric initial states

B Bertini, K Klobas, M Collura, P Calabrese, C Rylands - Physical Review B, 2024 - APS
Conserved-charge densities are very special observables in quantum many-body systems
as, by construction, they encode information about the dynamics. Therefore, their evolution …

Dynamical criticality of magnetization transfer in integrable spin chains

Ž Krajnik, J Schmidt, E Ilievski, T Prosen - Physical review letters, 2024 - APS
Recent studies have found that fluctuations of magnetization transfer in integrable spin
chains violate the central limit property. Here, we revisit the problem of anomalous counting …

Soliton gas: Theory, numerics, and experiments

P Suret, S Randoux, A Gelash, D Agafontsev, B Doyon… - Physical Review E, 2024 - APS
The concept of soliton gas was introduced in 1971 by Zakharov as an infinite collection of
weakly interacting solitons in the framework of Korteweg–de Vries (KdV) equation. In this …

Quantum many-body spin ratchets

L Zadnik, M Ljubotina, Ž Krajnik, E Ilievski, T Prosen - PRX quantum, 2024 - APS
Introducing a class of SU (2) invariant quantum unitary circuits generating chiral transport,
we examine the role of broken space-reflection and time-reversal symmetries on spin …

Hydrodynamic gauge fixing and higher order hydrodynamic expansion

J De Nardis, B Doyon - Journal of Physics A: Mathematical and …, 2023 - iopscience.iop.org
Hydrodynamics is a powerful emergent theory for the large-scale behaviours in many-body
systems, quantum or classical. It is a gradient series expansion, where different orders of …

Large-scale universality in quantum reaction-diffusion from Keldysh field theory

F Gerbino, I Lesanovsky, G Perfetto - Physical Review B, 2024 - APS
We consider the quantum reaction-diffusion dynamics in d spatial dimensions of a Fermi gas
subject to binary annihilation reactions A+ A→∅. These systems display collective …