Francica Gianluca
Dipartimento di Fisica e Astronomia G. Galilei, Università degli Studi di Padova, via Marzolo 8, 35131 Padova, Italy.
Phys Rev E. 2022 May;105(5):L052101. doi: 10.1103/PhysRevE.105.L052101.
Understanding the role of classical and quantum correlations in work extraction is a problem of fundamental importance in thermodynamics. We approach this problem by considering that, in closed quantum systems, the maximum cyclic work extractable is equal to the ergotropy. Thus, we aim to identify and investigate the contributions to the ergotropy coming from different kinds of initial correlations (total, classical, discord, and entanglement correlations). By doing so, we have introduced and studied quantifiers of correlations which are based on ergotropy. In particular, our results suggest that only discord correlations always give a positive contribution to work extraction, whereas total, classical, and entanglement correlations can reduce the work extraction.
理解经典关联和量子关联在功提取中的作用是热力学中一个具有根本重要性的问题。我们通过考虑在封闭量子系统中，可提取的最大循环功等于能熵来解决这个问题。因此，我们旨在识别和研究来自不同种类初始关联（总关联、经典关联、量子失协和纠缠关联）对能熵的贡献。通过这样做，我们引入并研究了基于能熵的关联量度。特别地，我们的结果表明，只有量子失协关联总是对功提取给出正贡献，而总关联、经典关联和纠缠关联会减少功提取。
