From quantum heat engines to laser cooling: Floquet theory beyond the Born–Markov approximation
From quantum heat engines to laser cooling: Floquet theory beyond the Born–Markov approximation
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DOI：
10.1088/1367-2630/aac583
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发表时间：
2017-12
影响因子：
3.3
通讯作者：
S. Restrepo;J. Cerrillo;P. Strasberg;G. Schaller
中科院分区：
文献类型：
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作者：
S. Restrepo;J. Cerrillo;P. Strasberg;G. Schaller
我们将Floquet理论和全计数统计的形式化与马尔可夫嵌入策略相结合，以超越传统的Born-Markov近似来访问周期性驱动热机的动力学和热力学。工质为两级系统，将掘进和耦合驱动到同一周期的一个槽内。我们确定了我们的机器的四种不同的运行机制，包括一个热机和一个冰箱。随着与单槽耦合强度的增大，制冷机工况消失，热机工况变窄，效率和性能系数下降。此外，我们的模型可以在特定的参数限制下再现捕获离子的激光冷却过程。
We combine the formalisms of Floquet theory and full counting statistics with a Markovian embedding strategy to access the dynamics and thermodynamics of a periodically driven thermal machine beyond the conventional Born–Markov approximation. The working medium is a two-level system and we drive the tunneling as well as the coupling to one bath with the same period. We identify four different operating regimes of our machine which include a heat engine and a refrigerator. As the coupling strength with one bath is increased, the refrigerator regime disappears, the heat engine regime narrows and their efficiency and coefficient of performance decrease. Furthermore, our model can reproduce the setup of laser cooling of trapped ions in a specific parameter limit.