论文标题
费米子一身纠缠作为热力学资源
Fermionic one-body entanglement as a thermodynamic resource
论文作者
论文摘要
关于是否应将两种费米子模式的被占用状态的连贯叠加纠缠在一起存在争议，也就是说，它的固有量子相关性是否在操作上可以访问并作为资源有用。这是根据奇偶校验超选择规则在各个模式上无法访问这种纠缠的基础上质疑的，该规则限制了物理可观察物的集合。换句话说，人们无法观察到违反贝尔的不平等。但是，在这里，我们表明，两种模式费米子状态的纠缠可以用作开放系统热力学过程中的真正量子资源，从而使人们能够执行可分开状态的任务。因此，我们证明了量子热力学可以阐明费米子纠缠的性质以及用于定义它的不同概念的操作含义。
There is ongoing controversy about whether a coherent superposition of the occupied states of two fermionic modes should be regarded entangled or not, that is, whether its intrinsic quantum correlations are operationally accessible and useful as a resource. This has been questioned on the basis that such an entanglement cannot be accessed by local operations on individual modes due to the parity superselection rule which constrains the set of physical observables. In other words, one cannot observe violations of Bell's inequality. Here we show, however, that entanglement of a two-mode fermionic state can be used as a genuine quantum resource in open-system thermodynamic processes, enabling one to perform tasks forbidden for separable states. We thus demonstrate that quantum thermodynamics can shed light on the nature of fermionic entanglement and the operational meaning of the different notions used to define it.
