中国物理B ›› 2019, Vol. 28 ›› Issue (5): 50502-050502.doi: 10.1088/1674-1056/28/5/050502

• SPECIAL TOPIC—Recent advances in thermoelectric materials and devices • 上一篇    下一篇

Unifying quantum heat transfer and superradiant signature in a nonequilibrium collective-qubit system:A polaron-transformed Redfield approach

Xu-Min Chen(陈许敏), Chen Wang(王晨)   

  1. 1 Department of Physics, Hangzhou Dianzi University, Hangzhou 310018, China;
    2 Department of Physics, Zhejiang Normal University, Jinhua 321004, China
  • 收稿日期:2018-12-27 修回日期:2019-02-07 出版日期:2019-05-05 发布日期:2019-05-05
  • 通讯作者: Chen Wang E-mail:wangchenyifang@gmail.com
  • 基金资助:

    Project supported by the National Natural Science Foundation of China (Grant Nos. 11874011 and 11704093).

Unifying quantum heat transfer and superradiant signature in a nonequilibrium collective-qubit system:A polaron-transformed Redfield approach

Xu-Min Chen(陈许敏)1, Chen Wang(王晨)2   

  1. 1 Department of Physics, Hangzhou Dianzi University, Hangzhou 310018, China;
    2 Department of Physics, Zhejiang Normal University, Jinhua 321004, China
  • Received:2018-12-27 Revised:2019-02-07 Online:2019-05-05 Published:2019-05-05
  • Contact: Chen Wang E-mail:wangchenyifang@gmail.com
  • Supported by:

    Project supported by the National Natural Science Foundation of China (Grant Nos. 11874011 and 11704093).

摘要:

We investigate full counting statistics of quantum heat transfer in a collective-qubit system constructed by multi-qubits interacting with two thermal baths. The nonequilibrium polaron-transformed Redfield approach embedded with an auxiliary counting field is applied to obtain the steady state heat current and fluctuations, which enables us to study the impact of the qubit-bath interaction in a wide regime. The heat current, current noise, and skewness are all found to clearly unify the limiting results in the weak and strong couplings. Moreover, the superradiant heat transfer is clarified as a system-size-dependent effect, and large number of qubits dramatically suppress the nonequilibrium superradiant signature.

关键词: quantum transport, heat conduction, phonons or vibrational states in low-dimensional structures and nanoscale materials, nonequilibrium and irreversible thermodynamics

Abstract:

We investigate full counting statistics of quantum heat transfer in a collective-qubit system constructed by multi-qubits interacting with two thermal baths. The nonequilibrium polaron-transformed Redfield approach embedded with an auxiliary counting field is applied to obtain the steady state heat current and fluctuations, which enables us to study the impact of the qubit-bath interaction in a wide regime. The heat current, current noise, and skewness are all found to clearly unify the limiting results in the weak and strong couplings. Moreover, the superradiant heat transfer is clarified as a system-size-dependent effect, and large number of qubits dramatically suppress the nonequilibrium superradiant signature.

Key words: quantum transport, heat conduction, phonons or vibrational states in low-dimensional structures and nanoscale materials, nonequilibrium and irreversible thermodynamics

中图分类号:  (Quantum transport)

  • 05.60.Gg
44.10.+i (Heat conduction) 63.22.-m (Phonons or vibrational states in low-dimensional structures and nanoscale materials) 05.70.Ln (Nonequilibrium and irreversible thermodynamics)