论文标题
集体三级量子热发动机的性能
Performance of the collective three-level quantum thermal engine
论文作者
论文摘要
我们研究了由V-或Lambda型发射器组成的微观量子热发动机的性能，当时与环境热储层接触时会集体或独立地相互作用。尽管Carnot周期的效率总是高于与这些设置相关的效率，但我们发现合作Lambda型热发动机的性能可能大于相似条件下的V型型。发射器之间的合作性在Lambda型设置中起着重要作用，可显着提高其性能，而与V型热发动机的相关性较小。这是因为这两个原子集合的人口反转及其非对抗元素的行为不同。
We investigate the performance of a microscopic quantum heat engine consisting of V- or Lambda-type emitters interacting collectively or independently when being in contact with environmental thermal reservoirs. Though the efficiency of a Carnot's cycle is always higher than those associated with these setups, we have found that the performance of the cooperative Lambda-type heat engine may be larger than that of the V-type under similar conditions. Cooperativity among the emitters plays an important role for the Lambda-type setup, significantly improving its performance, while is less relevant for a V-type thermal engine. This is because the population inversion on the working atomic transition as well as its off-diagonal elements behave differently for these two atomic ensembles.
