论文标题
在挤压的热储层下，非绝热量子谐波奥托发动机和冰箱的性能范围
Performance bounds of non-adiabatic quantum harmonic Otto engine and refrigerator under a squeezed thermal reservoir
论文作者
论文摘要
我们分析了量子奥托循环的性能，采用时间依赖性的谐波振荡器，因为在绝热阶段进行突然膨胀和压缩中风的工作流体，并耦合到挤压的储层。首先，我们表明，我们的发动机可以实现的最大效率仅为1/2，这与较早的研究声称在挤压储层的效果下声称单位效率的研究形成鲜明对比。然后，我们获得了效率以及OTTO循环性能系数的上限的分析表达式。获得的边界与系统的参数无关，仅取决于储层参数。此外，在热挤压热浴的情况下，我们获得了满足派生上限的最大工作效率的分析表达。此外，在冷藏库中挤压的情况下，我们指定了标准情况中Otto冰箱的操作制度。
We analyze the performance of a quantum Otto cycle, employing time-dependent harmonic oscillator as the working fluid undergoing sudden expansion and compression strokes during the adiabatic stages, coupled to a squeezed reservoir. First, we show that the maximum efficiency that our engine can achieve is 1/2 only, which is in contrast with the earlier studies claiming unit efficiency under the effect of squeezed reservoir. Then, we obtain analytic expressions for the upper bound on the efficiency as well as on the coefficient of performance of the Otto cycle. The obtained bounds are independent of the parameters of the system and depends on the reservoir parameters only. Additionally, with hot squeezed thermal bath, we obtain analytic expression for the efficiency at maximum work which satisfies the derived upper bound. Further, in the presence of squeezing in the cold reservoir, we specify an operational regime for the Otto refrigerator otherwise forbidden in the standard case.
