论文标题
真正多部分纠缠的热力学特征
Thermodynamic Signatures of Genuinely Multipartite Entanglement
论文作者
论文摘要
双方纠缠理论与热力学有着深刻的相似之处。在这封信中，我们将此连接扩展到多方量子系统，其中纠缠以不同的形式出现，真正的纠缠是最异国情调的。我们提出的热力学数量可以捕获多部分纠缠状态中真实性的特征。这些数量不是熵的，而是根据能量定义的，尤其是可以存储在量子电池中的全球和局部萃取作品（麦角罗）之间的差异。其中一些数量足以作为真实性的忠实衡量，并在某种程度上区分了不同类别的真正纠缠状态。除了仔细检查这些措施的属性外，我们还将它们与其他现有的真实措施进行了比较，并认为它们可以更好地实现目的。此外，我们方法的一般性允许定义捕获$ k $ - nosesparability的签名的适当功能，该功能以质量不同的多部分系统中的纠缠表现为质量不同。
Theory of bipartite entanglement shares profound similarities with thermodynamics. In this letter we extend this connection to multipartite quantum systems where entanglement appears in different forms with genuine entanglement being the most exotic one. We propose thermodynamic quantities that capture signature of genuineness in multipartite entangled states. Instead of entropy, these quantities are defined in terms of energy -- particularly the difference between global and local extractable works (ergotropies) that can be stored in quantum batteries. Some of these quantities suffice as faithful measures of genuineness and to some extent distinguish different classes of genuinely entangled states. Along with scrutinizing properties of these measures we compare them with the other existing genuine measures, and argue that they can serve the purpose in a better sense. Furthermore, generality of our approach allows to define suitable functions of ergotropies capturing the signature of $k$-nonseparability that characterizes qualitatively different manifestations of entanglement in multipartite systems.
