Watanabe Gentaro, Venkatesh B Prasanna, Talkner Peter, Del Campo Adolfo
Department of Physics and Zhejiang Institute of Modern Physics, Zhejiang University, Hangzhou, Zhejiang 310027, China.
Center for Theoretical Physics of Complex Systems, Institute for Basic Science (IBS), Daejeon 34051, Korea.
Phys Rev Lett. 2017 Feb 3;118(5):050601. doi: 10.1103/PhysRevLett.118.050601. Epub 2017 Feb 2.
The performance of quantum heat engines is generally based on the analysis of a single cycle. We challenge this approach by showing that the total work performed by a quantum engine need not be proportional to the number of cycles. Furthermore, optimizing the engine over multiple cycles leads to the identification of scenarios with a quantum enhancement. We demonstrate our findings with a quantum Otto engine based on a two-level system as the working substance that supplies power to an external oscillator.
量子热机的性能通常基于对单个循环的分析。我们对这种方法提出质疑，通过证明量子发动机执行的总功不必与循环次数成正比。此外，在多个循环上优化发动机可导致识别出具有量子增强的情形。我们以基于两能级系统作为工作物质的量子奥托发动机为例来证明我们的发现，该发动机为外部振荡器供电。
