论文标题
选择性弱测量结果揭示了超级麦角
Selective weak measurement reveals super ergotropy
论文作者
论文摘要
先前将麦芽糖反应的概念作为量子状态的最大提取作品引入。它的增强是通过射影测量来诱导的，它被表述为守恒的麦内型。在这项工作中，我们通过弱测量在存在量子相关性的情况下研究了麦内型，因为它对测得的系统具有优雅的影响。通过考虑由主要和辅助系统组成的两分相关的量子系统，我们证明了非选择性弱测量值对Ancilla的可提取工作始终等于强度测量所捕获的情况。然而，有趣的弱测量值揭示的工作比守卫氏症的作用更多，并且总系统的麦内型大于或等于守卫的麦角镜。此外，结果表明，对于贝尔对角线状态，以失去量子相关的成本，可以通过使用测量来增加可提取的总可提取和非本地提取作品。另外，我们发现这些情况下的量子相关性与非本地提取工作之间没有直接的关系。
The concept of ergotropy was previously introduced as the maximum extractable work from a quantum state. Its enhancement, which is induced by quantum correlation via projective measurement, was formulated as the daemonic ergotropy. In this work, we investigate the ergotropy in the presence of quantum correlation via weak measurement because of its elegant effects on the measured system. By considering a bipartite correlated quantum system consisting of main and ancillary systems, we demonstrate that the extractable work by the non-selective weak measurement on the ancilla is always equal to the situation captured by the strong measurement. However, the selective weak measurement interestingly reveals more work than the daemonic ergotropy and the ergotropy of the total system is greater than or equal to the daemonic ergotropy. Moreover, it is shown that for Bell diagonal states, at the cost of losing quantum correlation, the total extractable and thus non-local extractable works can be increased by using measurement. Also, we find that there is no direct relationship between quantum correlation and non-local extractable work for these cases.
