Quantized Thouless pumps protected by interactions in dimerized Rydberg tweezer arrays
arxiv(2024)
Abstract
We study Thouless pumps, i.e., adiabatic topological transport, in an
interacting spin chain described by the dimerized XXZ Hamiltonian. In the
noninteracting case, quantized Thouless pumps can only occur when a topological
singularity is encircled adiabatically. In contrast, here we show that, in the
presence of interactions, such topological transport can even persist for
exotic paths in which the system gets arbitrarily close to the singularity. We
illustrate the robustness of these exotic Thouless pumps through the behavior
of the noninteracting singularity, which for sufficiently strong interactions
splits into two singularities separated by a spontaneous antiferromagnetic
insulator. We perform a numerical benchmark of these phenomena by means of
tensor network simulations of ground-state physics and real-time adiabatic
dynamics. Finally, we propose an experimental protocol with Floquet-driven
Rydberg tweezer arrays.
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