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Title: Berry-phase-induced heat pumping and its impact on the fluctuation theorem
Authors: Ren, J.
Hänggi, P. 
Li, B. 
Issue Date: 27-Apr-2010
Citation: Ren, J., Hänggi, P., Li, B. (2010-04-27). Berry-phase-induced heat pumping and its impact on the fluctuation theorem. Physical Review Letters 104 (17) : -. ScholarBank@NUS Repository.
Abstract: Applying adiabatic, cyclic two-parameter modulations we investigate quantum heat transfer across an anharmonic molecular junction contacted with two heat baths. We demonstrate that the pumped heat typically exhibits a Berry-phase effect in providing an additional geometric contribution to heat flux. Remarkably, a robust fractional quantized geometric phonon response is identified as well. The presence of this geometric phase contribution in turn causes a breakdown of the fluctuation theorem of the Gallavotti-Cohen type for quantum heat transfer. This can be restored only if (i) the geometric phase contribution vanishes and if (ii) the cyclic protocol preserves the detailed balance symmetry. © 2010 The American Physical Society.
Source Title: Physical Review Letters
ISSN: 00319007
DOI: 10.1103/PhysRevLett.104.170601
Appears in Collections:Staff Publications

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