摘要
We investigate the quantum thermal transistor effect in nonequilibrium three-level systems by applying the polarontransformed Redfield equation combined with full counting statistics.The steady state heat currents are obtained via this unified approach over a wide region of system–bath coupling,and can be analytically reduced to the Redfield and nonequilibrium noninteracting blip approximation results in the weak and strong coupling limits,respectively.A giant heat amplification phenomenon emerges in the strong system–bath coupling limit,where transitions mediated by the middle thermal bath are found to be crucial to unravel the underlying mechanism.Moreover,the heat amplification is also exhibited with moderate coupling strength,which can be properly explained within the polaron framework.
作者
Chen Wang
Da-Zhi Xu
王晨;徐大智(Department of Physics,Zhejiang Normal University,Jinhua 321004,China;School of Physics and Center for Quantum Technology Research,Beijing Institute of Technology,Beijing 100081,China)
基金
the National Natural Science Foundation of China(Grant Nos.11704093 and 11705008)
Beijing Institute of Technology Research Fund Program for Young Scholars,China.
作者简介
Corresponding author:王晨,E-mail:wangchenyifang@gmail.com;Corresponding author:徐大智,E-mail:dzxu@bit.edu.cn。
