Nonequilibrium Energy Transfer at Nanoscale: A Unified Theory from Weak to Strong Coupling
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Wang-2015-Nonequilibrium energy.pdf
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809.38 KB
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Author(s)
Wang, Chen
Ren, Jie
Cao, Jianshu
Date Issued
July 2015
Journal
Scientific Reports
Publisher
Nature Publishing Group
Citation
Wang, Chen, Jie Ren, and Jianshu Cao. “Nonequilibrium Energy Transfer at Nanoscale: A Unified Theory from Weak to Strong Coupling.” Scientific Reports 5 (July 8, 2015): 11787.
Version
Final published version
Abstract
Unraveling the microscopic mechanism of quantum energy transfer across two-level systems provides crucial insights to the optimal design and potential applications of low-dimensional nanodevices. Here, we study the non-equilibrium spin-boson model as a minimal prototype and develop a fluctuation-decoupled quantum master equation approach that is valid ranging from the weak to the strong system-bath coupling regime. The exact expression of energy flux is analytically established, which dissects the energy transfer as multiple boson processes with even and odd parity. Our analysis provides a unified interpretation of several observations, including coherence-enhanced heat flux and negative differential thermal conductance. The results will have broad implications for the fine control of energy transfer in nano-structural devices.
MIT Department
Massachusetts Institute of Technology. Department of Chemistry
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Creative Commons Attribution
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DOI of Published Version
https://doi.org/10.1038/srep11787
