对“发散功率输出下的卡诺效率”的评论（和附加讨论）
Comment on "Carnot efficiency at divergent power output" (and additional discussion)
摘要：
在最近的一封信[EPL，118（2017）40003]中，Polettini和Esposito声称，理论上，热力学机器可以通过使用无限快的过程在不同的功率输出下实现卡诺效率。然而，这种说法似乎是误导性的，因为它没有得到下面所示的推导的支持。在这篇评论中，我们首先指出，关于最佳效率的概念存在着混淆。然后，我们分析了参考文献[EPL，118（2017）40003]中描述的量子点发动机，并证明卡诺效率仅在输出功率消失时恢复。此外，在附录中还讨论了利用无穷大的摩擦力达到卡诺效率的问题。
英文摘要：
In a recent Letter [EPL, 118 (2017) 40003], Polettini and Esposito claimed that it is theoretically possible for a thermodynamic machine to achieve Carnot efficiency at divergent power output through the use of infinitely-fast processes. It appears however that this assertion is misleading as it is not supported by their derivations as demonstrated below. In this Comment, we first show that there is a confusion regarding the notion of optimal efficiency. We then analyze the quantum dot engine described in Ref. [EPL, 118 (2017) 40003] and demonstrate that Carnot efficiency is recovered only for vanishing output power. Moreover, a discussion on the use of infinite thermodynamical forces to reach Carnot efficiency is also presented in the appendix.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
