Non-canonical distribution and non-equilibrium transport beyond weak system-bath coupling regime: A polaron transformation approach
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11467_2016_Article_540.pdf
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Author(s)
Xu, Dazhi
Cao, Jianshu
Date Issued
May 2016
Journal
Frontiers of Physics
Publisher
Higher Education Press
Citation
Xu, Dazhi, and Jianshu Cao. “Non-Canonical Distribution and Non-Equilibrium Transport beyond Weak System-Bath Coupling Regime: A Polaron Transformation Approach.” Frontiers of Physics 11.4 (2016): n. pag.
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Author's final manuscript
Abstract
The concept of polaron, emerged from condense matter physics, describes the dynamical interaction of moving particle with its surrounding bosonic modes. This concept has been developed into a useful method to treat open quantum systems with a complete range of system-bath coupling strength. Especially, the polaron transformation approach shows its validity in the intermediate coupling regime, in which the Redfield equation or Fermi’s golden rule will fail. In the polaron frame, the equilibrium distribution carried out by perturbative expansion presents a deviation from the canonical distribution, which is beyond the usual weak coupling assumption in thermodynamics. A polaron transformed Redfield equation (PTRE) not only reproduces the dissipative quantum dynamics but also provides an accurate and efficient way to calculate the non-equilibrium steady states. Applications of the PTRE approach to problems such as exciton diffusion, heat transport and light-harvesting energy transfer are presented.
MIT Department
Massachusetts Institute of Technology. Department of Chemistry
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Creative Commons Attribution-Noncommercial-Share Alike
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DOI of Published Version
https://doi.org/10.1007/s11467-016-0540-2
