论文标题
与单量子浴的强烈耦合量子奥托循环
Strongly coupled quantum Otto cycle with single qubit bath
论文作者
论文摘要
我们讨论了一个封闭的量子演变的模型，其中选择了联合哈密顿量，以至于其中一个量子位充当浴室，并将其充当系统的另一个量子化。得出了系统的相应的精确主方程。有趣的是，对于特定的参数选择，主方程将带有恒定系数的Gorini-Kossakowski-lindblad-Sudarshan（GKLS）形式形式，代表单个量子系统的泵送和阻尼。基于此模型，我们构建了连接到单个值浴的Otto循环并研究其热力学特性。我们的分析超出了传统的弱耦合方案，并说明了包括非马克维亚性在内的有限浴室的影响。我们发现效率（性能系数）的封闭形式表达式，用于热发动机状态（冰箱制度）的功率（冷却能力），以进行不同的汉密尔顿关节修饰。
We discuss a model of a closed quantum evolution of two-qubits where the joint Hamiltonian is so chosen that one of the qubits acts as a bath and thermalize the other qubit which is acting as the system. The corresponding exact master equation for the system is derived. Interestingly, for a specific choice of parameters the master equation takes the Gorini-Kossakowski-Lindblad-Sudarshan (GKLS) form with constant coefficients, representing pumping and damping of a single qubit system. Based on this model we construct an Otto cycle connected to a single qubit bath and study its thermodynamic properties. Our analysis goes beyond the conventional weak coupling scenario and illustrates the effects of finite bath including non-Markovianity. We find closed form expressions for efficiency (coefficient of performance), power (cooling power) for heat engine regime (refrigerator regime) for different modifications of the joint Hamiltonian.
