Details

Autor(en) / Beteiligte

• Wang, Chen
• Ren, Jie
• Cao, Jianshu

Titel

Nonequilibrium Energy Transfer at Nanoscale: A Unified Theory from Weak to Strong Coupling

Ist Teil von

• Scientific reports, 2015-07, Vol.5 (1), p.11787-11787, Article 11787

Ort / Verlag

England: Nature Publishing Group

Erscheinungsjahr

2015

Quelle

EZB Electronic Journals Library

Beschreibungen/Notizen

• 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.