Nonadiabatic Breaking of Topological Pumping

Lorenzo Privitera, Angelo Russomanno, Roberta Citro, and Giuseppe E. Santoro
Phys. Rev. Lett. 120, 106601 – Published 9 March 2018
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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 nonadiabatic 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 nonanalytic behavior 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.

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  • Received 28 September 2017

DOI:https://doi.org/10.1103/PhysRevLett.120.106601

© 2018 American Physical Society

Physics Subject Headings (PhySH)

Condensed Matter, Materials & Applied Physics

Authors & Affiliations

Lorenzo Privitera1, Angelo Russomanno2,3, Roberta Citro4, and Giuseppe E. Santoro1,3,5

  • 1SISSA, Via Bonomea 265, I-34136 Trieste, Italy
  • 2Scuola Normale Superiore, Piazza dei Cavalieri 7, I-56127 Pisa, Italy
  • 3International Centre for Theoretical Physics (ICTP), P.O.Box 586, I-34014 Trieste, Italy
  • 4Dipartimento di Fisica “E.R. Caianiello”, Università degli Studi di Salerno and Spin-CNR Unità, Via Giovanni Paolo II, 132, I-84084 Fisciano (Sa), Italy
  • 5CNR-IOM Democritos National Simulation Center, Via Bonomea 265, I-34136 Trieste, Italy

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Issue

Vol. 120, Iss. 10 — 9 March 2018

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