Please use this identifier to cite or link to this item:
|Title:||Noncanonical statistics of a spin-boson model: Theory and exact Monte Carlo simulations|
|Authors:||Lee, C.K. |
|Citation:||Lee, C.K., Cao, J., Gong, J. (2012-08-10). Noncanonical statistics of a spin-boson model: Theory and exact Monte Carlo simulations. Physical Review E - Statistical, Nonlinear, and Soft Matter Physics 86 (2) : -. ScholarBank@NUS Repository. https://doi.org/10.1103/PhysRevE.86.021109|
|Abstract:||Equilibrium canonical distribution in statistical mechanics assumes weak system-bath coupling (SBC). In real physical situations this assumption can be invalid, and equilibrium quantum statistics of the system may be noncanonical. By exploiting both polaron transformation and perturbation theory in a spin-boson model, an analytical treatment is advocated to study noncanonical statistics of a two-level system at arbitrary temperature and for arbitrary SBC strength, yielding theoretical results in agreement with exact Monte Carlo simulations. In particular, the eigen-representation of system's reduced density matrix is used to quantify noncanonical statistics as well as the quantumness of the open system. For example, it is found that irrespective of SBC strength, noncanonical statistics enhances as temperature decreases but vanishes at high temperature. © 2012 American Physical Society.|
|Source Title:||Physical Review E - Statistical, Nonlinear, and Soft Matter Physics|
|Appears in Collections:||Staff Publications|
Show full item record
Files in This Item:
There are no files associated with this item.
checked on Jun 22, 2018
WEB OF SCIENCETM
checked on May 21, 2018
checked on Jun 1, 2018
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.