论文标题
大型旋转时间量子相关性的辅助辅助探测
Ancilla-assisted probing of temporal quantum correlations of large spins
论文作者
论文摘要
当测量两个或多个不同时间量子旋转时，由于较早的测量结果，后来的测量结果受到测量反向的影响。这使得临时量子相关函数的测量具有挑战性。在本文中，我提出了一种测量协议，该方案通过利用自旋选择规则来减轻测量背部的影响。我表明，在适当的条件下，测量背部对两次量子相关的影响在探测由旋转量子数$ l \ gg s $组成的系统中，通过将其耦合到旋转$ s $ s $ acncilla的自由度。这种测量方案的潜在应用是通过光探测一系列Bose-Einstein凝结。
When measuring quantum spins at two or more different times, the later measurements are affected by measurement backaction occurring due to the earlier measurements. This makes the measurement of temporal quantum correlation functions challenging. In this paper, I propose a measurement protocol that mitigates the effect of measurement backaction by exploiting spin selection rules. I show that, under suitable conditions, the effect of measurement backaction on two-time quantum correlations becomes negligible when probing a system consisting of spins with large spin quantum numbers $l\gg s$ by coupling it to a spin-$s$ ancilla degree of freedom. A potential application of such a measurement protocol is the probing of an array of Bose-Einstein condensates by light.
