论文标题
杂质揭示了量子热力学周期中不同的操作阶段
Impurity reveals distinct operational phases in quantum thermodynamic cycles
论文作者
论文摘要
我们分析了杂质对量子Otto和量子Carnot热周期的工作输出和效率的影响，该量子在无限平方孔（ISW）电位中建模为单个量子粒子，这是工作物质。我们分别在强度和弱耦合方案的杂质上触及到第一和二阶的量子机械系统。我们将强耦合方案的工作和效率的分析表达得出到强度参数中的一阶。弱耦合中强度参数的阈值是获得了数值结果与排斥和有吸引力杂质的扰动结果一致的。令我们惊讶的是，嵌入式杂质会在系统中解锁新的操作阶段，例如量子热发动机，量子冰箱和量子冷泵。此外，可以看到量子奥托热发动机的效率达到某些参数状态的carnot效率。量子冰箱和量子冷泵的冷却能力和性能受到杂质的影响。
We analyze the effect of impurity on the work output and efficiency of quantum Otto and quantum Carnot heat cycles, modeled as a single quantum particle in an infinite square well (ISW) potential, which is the working substance. We solve this quantum mechanical system perturbatively up to first and second order in strength of the impurity for strong and weak coupling regimes, respectively. We derive the analytical expressions of work and efficiency for the strong coupling regime to the first order in the strength parameter. The threshold value of the strength parameter in weak coupling is obtained up to which the numerical result agrees with the perturbative result for a repulsive and attractive impurity. To our surprise, an embedded impurity unlocks new operational phases in the system, such as a quantum heat engine, quantum refrigerator, and quantum cold pump. In addition, the efficiency of the quantum Otto heat engine is seen to reach Carnot efficiency for some parameter regimes. The cooling power and coefficient of performance of the quantum refrigerator and quantum cold pump are non-trivially affected by the impurity.
