2018/02/28 by Yu-Han Ma, Dazhi Xu, Hui Dong +1
Physics and Astronomy · #cond-mat.stat-mech #quant-ph
paper · pdf · doi:10.1103/physreve.98.042112
published as Phys. Rev. E 98, 042112 (2018) · 11 pages, 8 figures, detailed appendix is added in the latest version. Comments are wlecome, [email protected]
arxiv created 2018/10/07 · arxiv updated 2018/10/09
The constraint relation for efficiency and power is crucial to design optimal heat engines operating within finite time. We find a universal constraint between efficiency and output power for heat engines operating in the low-dissipation regime. Such constraint is validated with an example of Carnot-like engine. Its microscopic dynamics is governed by the master equation. Based on the master equation, we connect the microscopic coupling strengths to the generic parameters in the phenomenological model. We find the usual assumption of low-dissipation is achieved when the coupling to thermal environments is stronger than the driving speed. Additionally, such connection allows the design of practical cycle to optimize the engine performance.