Study of the energy variation in many-body open quantum systems: Role of interactions in the weak and strong coupling regimes
Research output: Contribution to journal › Article
- Univ Turku, University of Turku, Dept Phys & Astron, Turku Ctr Quantum Phys, QTF Ctr Excellence
We derive an expression for the rate of change of the energy of an interacting many-body system connected to macroscopic leads. We show that the energy variation is the sum of contributions from each different lead. Unlike the charge current each of these contributions can differ from the rate of change of the energy of the lead. We demonstrate that the discrepancy between the two is due to the direct exchange of energy among the considered lead and all other leads. We conclude that the microscopic mechanism behind it is virtual processes via the interacting central region. We also speculate on what are the implications of our findings in the calculation of the thermal conductance of an interacting system.
|Number of pages||11|
|Journal||Physical Review B|
|Publication status||Published - 6 Jan 2020|
|MoE publication type||A1 Journal article-refereed|