Bulletin of the American Physical Society
55th Annual Meeting of the APS Division of Atomic, Molecular and Optical Physics
Monday–Friday, June 3–7, 2024; Fort Worth, Texas
Session K00: Poster Session II (4pm-6pm CDT)
4:00 PM,
Wednesday, June 5, 2024
Room: Hall BC
Abstract: K00.00101 : Autonomous Thouless Pump and non-equilibrium topological phases*
Presenter:
Julius Bohm
(University of Kaiserslautern-Landau)
Authors:
Julius Bohm
(University of Kaiserslautern-Landau)
Michael Fleischhauer
(University of Kaiserslautern-Landau)
We here present various theoretical models, were the interplay between cw external drive, dissipation and interactions drives the system into a limit-cycle pumping phase without explicit time-dependencies. Specifically we consider a fermionic Rice-Mele chain coupled to either one or many rotating spins which control on-site energies and hopping amplitudes. We investigate both the quantum (small spins) and the mean-field limit (large spins) and the transition between the two. The many-body polarization introduced by Resta [3] shows a non-vanishing winding which identifies a non-trivial, non-equilibrium topological phase. The limit-cycle character of the steady state of the system guarantees a robust, autonomous operation of the topological pump.
[1] D. J. Thouless, Phys. Rev. B 27, 6083 (1983)
[2] D. Dreon, et al., Nature 608, 494–498 (2022)
[3] R. Resta, Phys. Rev. Lett. 80, 1800 (1998)
*The authors gratefully acknowledge financial support from the DFG through SFB TR 185, project number 277625399.
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