Optimal rectification in the ultrastrong coupling regime

We study the effect of ultrastrong coupling on the transport of heat. In particular, we present a condition for optimal rectification, i.e., flow of heat in one direction and complete isolation in the opposite direction. We show that the strong-coupling formalism is necessary for correctly describin...

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Published inPhysical review. E, Statistical, nonlinear, and soft matter physics Vol. 89; no. 6; p. 062109
Main Authors Werlang, T, Marchiori, M A, Cornelio, M F, Valente, D
Format Journal Article
LanguageEnglish
Published United States 05.06.2014
Subjects
Hot Temperature
Models, Theoretical
Quantum Theory
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Summary:We study the effect of ultrastrong coupling on the transport of heat. In particular, we present a condition for optimal rectification, i.e., flow of heat in one direction and complete isolation in the opposite direction. We show that the strong-coupling formalism is necessary for correctly describing heat flow in a wide range of parameters, including moderate to low couplings. We present a situation in which the strong-coupling formalism predicts optimal rectification whereas the phenomenological approach predicts no heat flow in any direction, for the same parameter values.
ISSN:1550-2376
DOI:10.1103/physreve.89.062109