Díaz María García, Guarnieri Giacomo, Paternostro Mauro
Física Teòrica: Informació i Fenòmens Quàntics, Departament de Física, Universitat Autònoma de Barcelona, ES-08193 Bellaterra (Barcelona), Spain.
School of Physics, Trinity College Dublin, College Green, Dublin 2, Ireland;
Entropy (Basel). 2020 Oct 27;22(11):1223. doi: 10.3390/e22111223.
The two-point measurement scheme for computing the thermodynamic work performed on a system requires it to be initially in equilibrium. The Margenau-Hill scheme, among others, extends the previous approach to allow for a non-equilibrium initial state. We establish a quantitative comparison between both schemes in terms of the amount of coherence present in the initial state of the system, as quantified by the l1-coherence measure. We show that the difference between the two first moments of work, the variances of work, and the average entropy production obtained in both schemes can be cast in terms of such initial coherence. Moreover, we prove that the average entropy production can take negative values in the Margenau-Hill framework.
用于计算对系统所做热力学功的两点测量方案要求系统最初处于平衡态。除其他方案外，马根瑙 - 希尔方案扩展了先前的方法，以允许非平衡初始态。我们根据系统初始态中存在的相干量（由l1相干度量量化）对这两种方案进行了定量比较。我们表明，两种方案中功的两个一阶矩之差、功的方差以及平均熵产生都可以用这种初始相干来表示。此外，我们证明在马根瑙 - 希尔框架下平均熵产生可以取负值。
