Emergence of Navier-Stokes hydrodynamics in chaotic quantum circuits
Abstract
We construct an ensemble of two-dimensional nonintegrable quantum circuits that are chaotic but have a conserved particle current, and thus a finite Drude weight. The long-wavelength hydrodynamics of such systems is given by the incompressible Navier-Stokes equations. By analyzing circuit-to-circuit fluctuations in the ensemble we argue that these are negligible, so the circuit-averaged value of transport coefficients like the viscosity is also (in the long-time limit) the value in a typical circuit. The circuit-averaged transport coefficients can be mapped onto a classical irreversible Markov process. Therefore, remarkably, our construction allows us to efficiently compute the viscosity of a family of strongly interacting chaotic two-dimensional quantum systems.
Cite
@article{arxiv.2405.13892,
title = {Emergence of Navier-Stokes hydrodynamics in chaotic quantum circuits},
author = {Hansveer Singh and Ewan McCulloch and Sarang Gopalakrishnan and Romain Vasseur},
journal= {arXiv preprint arXiv:2405.13892},
year = {2025}
}
Comments
4+epsilon pages, 3 figures; 8 pages supplemental material