Non-adiabatic breaking of topological pumping
Quantum Gases
2018-03-14 v2
Abstract
We study Thouless pumping out of the adiabatic limit. Our findings show that despite its topological nature, this phenomenon is not {generically} robust to non-adiabatic effects. Indeed we find that the Floquet diagonal ensemble value of the pumped charge shows a deviation from the topologically quantized limit which is quadratic in the driving frequency {for a sudden switch-on of the driving}. This is reflected also in the charge pumped in a single period, which shows a non-analytic behaviour on top of an overall quadratic decrease. Exponentially small corrections are recovered only with a careful tailoring of the driving protocol. We also discuss thermal effects and the experimental feasibility of observing such a deviation.
Keywords
Cite
@article{arxiv.1709.08457,
title = {Non-adiabatic breaking of topological pumping},
author = {Lorenzo Privitera and Angelo Russomanno and Roberta Citro and Giuseppe E. Santoro},
journal= {arXiv preprint arXiv:1709.08457},
year = {2018}
}