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Poster Session

Poster Session II

4:00 pm – 6:00 pm, Wednesday June 18 Session H00 Oregon Convention Center, Exhibit Hall E
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Autonomous Thouless pump

Poster 122
Presenter: Julius Bohm (RPTU University of Kaiserslautern-Landau)
Authors: James Anglin (RPTU University of Kaiserslautern-Landau), Michael Fleischhauer (Technical University of Kaiserslautern)

The Thouless pump is a paradigmatic example for a dynamical topological process in non-interacting 1+1-dimensional lattice systems [1]. Cyclic variation of lattice parameters can lead to quantized transport of particles in that lattice protected by a topological invariant. By now theoretical as well as experimental approaches for these pumps rely on direct modulation of the lattice parameters in time. Recent experiments [2] have shown, however, that replacing the lattice parameter by dynamical quantum degrees of freedom subject to cw drive (and losses) can lead to self-sustained, i.e. autonomous topological pumps.

We here present a theoretical model, were a single or many spins controlling the hopping and onsite potentials of the lattice particles and are subject to a constant magnetic field "drive" the system into a pumping phase without explicit time-dependencies.

This pumping phase represents a non-equilibrium topological phase in excited eigenstates of the interacting system.

[1] D. J. Thouless, Phys. Rev. B 27, 6083 (1983)

[2] D. Dreon, et al., Nature 608, 494–498 (2022)

Funding acknowledgement

This work was supported by the German Research Foundation (DFG) by means of the Collaborative Research Center Sonderforschungsbereich SFB/TR185 (Project No. 277625399)

POSTERS (156)