Universal transport in periodically driven systems without long-lived quasiparticles

Journal Article · 24 January 2024 · Physical Review Research

DOI: https://doi.org/10.1103/PhysRevResearch.6.013094 · OSTI ID:2282806

Esin, Iliya ; Kuhlenkamp, Clemens ; Refael, Gil; Berg, Erez; Rudner, Mark S.; Lindner, Netanel H.

An intriguing regime of universal charge transport at high entropy density has been proposed for periodically driven interacting one-dimensional systems with Bloch bands separated by a large single-particle band gap. For weak interactions, a simple picture based on well-defined Floquet quasiparticles suggests that the system should host a quasisteady state current that depends only on the populations of the system's Floquet-Bloch bands and their associated quasienergy winding numbers. Here we show that such topological transport persists into the strongly interacting regime where the single-particle lifetime becomes shorter than the drive period. Analytically, we show that the value of the current is insensitive to interaction-induced band renormalizations and lifetime broadening when certain conditions are met by the system's nonequilibrium distribution function. We show that these conditions correspond to a quasisteady state. We support these predictions through numerical simulation of a system of strongly interacting fermions in a periodically modulated chain of Sachdev-Ye-Kitaev dots. Our paper establishes universal transport at high entropy density as a robust far from equilibrium topological phenomenon, which can be readily realized with cold atoms in optical lattices. Published by the American Physical Society 2024

• Sponsoring Organization: USDOE
• Grant/Contract Number: SC0019166
• OSTI ID: 2282806
• Journal Information: Physical Review Research, Journal Name: Physical Review Research Journal Issue: 1 Vol. 6; ISSN 2643-1564; ISSN PPRHAI
• Publisher: American Physical SocietyCopyright Statement
• Country of Publication: United States
• Language: English