Topological Floquet-Thouless Energy Pump

We explore adiabatic pumping in the presence of a periodic drive, finding a new phase in which the topologically quantized pumped quantity is energy rather than charge. The topological invariant is given by the winding number of the micromotion with respect to time within each cycle, momentum, and a...

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Published in:Physical review letters 2018-04, Vol.120 (15), p.150601-150601, Article 150601
Main Authors: Kolodrubetz, Michael H, Nathan, Frederik, Gazit, Snir, Morimoto, Takahiro, Moore, Joel E
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Language:English
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Adiabatic flow
Charge pumps
Robustness (mathematics)
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creator Kolodrubetz, Michael H
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description We explore adiabatic pumping in the presence of a periodic drive, finding a new phase in which the topologically quantized pumped quantity is energy rather than charge. The topological invariant is given by the winding number of the micromotion with respect to time within each cycle, momentum, and adiabatic tuning parameter. We show numerically that this pump is highly robust against both disorder and interactions, breaking down at large values of either in a manner identical to the Thouless charge pump. Finally, we suggest experimental protocols for measuring this phenomenon.
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source American Physical Society:Jisc Collections:APS Read and Publish 2023-2025 (reading list)
subjects Adiabatic flow
Charge pumps
Robustness (mathematics)
title Topological Floquet-Thouless Energy Pump
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