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Energy Current Rectification and Mobility Edges

Research output: Contribution to journalArticle

Original languageEnglish
Article number020603
Number of pages6
JournalPhysical Review Letters
Volume123
Issue number2
DOIs
DateSubmitted - 27 Sep 2018
DateAccepted/In press - 4 Mar 2019
DatePublished (current) - 10 Jul 2019

Abstract

We investigate how the presence of a single-particle mobility edge in a system can generate strong energy current rectification. Specifically, we study a quadratic bosonic chain subject to a quasiperiodic potential and coupled at its boundaries to spin baths of differing temperature. We find that rectification increases by orders of magnitude depending on the spatial position in the chain of localized eigenstates above the mobility edge. The largest enhancements occur when the coupling of one bath to the system is dominated by a localized eigenstate, while the other bath couples to numerous delocalized eigenstates. By tuning the parameters of the quasiperiodic potential it is thus possible to vary the amplitude, and even invert the direction, of the rectification.

    Research areas

  • cond-mat.stat-mech, cond-mat.dis-nn, cond-mat.quant-gas

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    Rights statement: This is the final published version of the article (version of record). It first appeared online via APS at https://doi.org/10.1103/PhysRevLett.123.020603 . Please refer to any applicable terms of use of the publisher.

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