论文标题
光学泵送量子电池和两冲程加热发动机的效率
Efficiency of optically pumping a quantum battery and a two-stroke heat engine
论文作者
论文摘要
在这项工作中，我们研究了通过光学泵送为量子电池充电的效率。电池由QUTRIT组成，并连接到天然的热储层和一个极限的外部连贯驱动器，在该驱动器可以从动力学中绝热地消除其上部能级。在这种情况下，驱动器加上自发发射的光学泵送QUTRIT的中间能级和电池可以理解为被有效的高温储层充电，该储层将其与天然储层中的平衡相提并论，并在其中存储有用的能量。我们还分析了使用此电池和充电方案作为两冲程热机的工作流体的效率。热机包括第四级，通过统一转换从电池中提取工作，因此设定了机器的最高效率的极限。
In this work, we study the efficiency of charging a quantum battery through optical pumping. The battery consists of a qutrit and it is connected to a natural thermal reservoir and an external coherent drive in the limit where its upper energy level can be adiabatically eliminated from the dynamics. In this scenario, the drive plus spontaneous emission optically pumps the intermediate energy level of the qutrit and the battery can be understood as being charged by an effective higher temperature reservoir that takes it out of equilibrium with the natural reservoir and stores useful energy in it. We also analyse the efficiency of using this battery and charging scheme as the work fluid of a two-stroke thermal machine. The thermal machine includes a fourth level through which work is extracted from the battery via a unitary transformation, therefore setting the limit of maximum efficiency of the machine.
