Title: Integrable Many-Body Quantum Floquet-Thouless Pumps

Abstract

We construct an interacting integrable Floquet model featuring quasiparticle excitations with topologically nontrivial chiral dispersion. This model is a fully quantum generalization of an integrable classical cellular automaton. Here, we write down and solve the Bethe equations for the generalized quantum model and show that these take on a particularly simple form that allows for an exact solution: essentially, the quasiparticles behave like interacting hard rods. The generalized thermodynamics and hydrodynamics of this model follow directly, providing an exact description of interacting chiral particles in the thermodynamic limit. Although the model is interacting, its unusually simple structure allows us to construct operators that spread with no butterfly effect; this construction does not seem possible in other interacting integrable systems. This model exemplifies a new class of exactly solvable, interacting quantum systems specific to the Floquet setting.

Authors:

Friedman, Aaron J. ^[1]; Gopalakrishnan, Sarang ^[2]; Vasseur, Romain ^[3]

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+ Show Author Affiliations

1. Univ. of California, Irvine, CA (United States). Dept. of Physics and Astronomy; Univ. of Massachusetts, Amherst, MA (United States). Dept. of Physics
2. City Univ. of New York (CUNY), NY (United States)
3. Univ. of Massachusetts, Amherst, MA (United States). Dept. of Physics

Publication Date:

2019-10-23

Research Org.:

Univ. of Massachusetts, Amherst, MA (United States)

Sponsoring Org.:

USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22); National Science Foundation (NSF)

OSTI Identifier:

1593349

Grant/Contract Number:  

SC0019168; DGE-1321846; DMR-1455366; DMR-1653271

Resource Type:

Accepted Manuscript

Journal Name:

Physical Review Letters

Additional Journal Information:

Journal Volume: 123; Journal Issue: 17; Journal ID: ISSN 0031-9007

Publisher:

American Physical Society (APS)

Country of Publication:

United States

Language:

English

Subject:

75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; 71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; Floquet systems; integrable systems; cellular automata