均匀加速的Unruh-DeWitt探测器中测量诱导非定域性的持续性

中文摘要 AI 辅助

均匀加速会诱导对Minkowski真空的热响应，从而可能改变量子关联。对于测量诱导非定域性（MIN）——一种不同于纠缠的非经典关联形式——先前对玻色子场的场模分析发现，MIN随加速度增加而减小，并在无限加速度极限下消失。这引发了一个问题：MIN的消失是Unruh效应的普遍结果，还是取决于加速量子系统的物理描述。为解决此问题，我们研究了两个均匀加速的Unruh-DeWitt探测器与无质量标量场相互作用。我们发现，MIN对Unruh温度的响应敏感地依赖于初始探测器态：它可以单调递减，在中间温度下消失随后恢复，或单调递增。此外，对于一大类初始态，MIN在高温极限下趋近于非零值。这些结果表明，强加速度下MIN的抑制并非普遍现象。相反，Unruh诱导的探测器动力学产生了状态依赖的响应，其中测量诱导非定域性可以被抑制、恢复或增强。

英文摘要

Uniform acceleration induces a thermal response to the Minkowski vacuum and can thereby modify quantum correlations. For measurement-induced nonlocality (MIN), a form of nonclassical correlation distinct from entanglement, previous field-mode analyses of bosonic fields found that it decreases with increasing acceleration and vanishes in the infinite-acceleration limit. This raises the question of whether the disappearance of MIN is a generic consequence of the Unruh effect or depends on the physical description of the accelerated quantum system. To address this question, we study two uniformly accelerating Unruh-DeWitt detectors interacting with a massless scalar field. We find that the response of MIN to the Unruh temperature depends sensitively on the initial detector state: it can decrease monotonically, vanish at an intermediate temperature and subsequently recover, or increase monotonically. Moreover, for a broad class of initial states, MIN approaches a nonzero value in the high-temperature limit. These results show that the suppression of MIN under strong acceleration is not universal. Instead, Unruh-induced detector dynamics gives rise to a state-dependent response in which measurement-induced nonlocality can be suppressed, restored, or enhanced.

发表机构

• College of Electronic and Optical Engineering and College of Flexible Electronics (Future Technology), Nanjing University of Posts and Telecommunications（南京邮电大学电子与光学工程学院、柔性电子（未来技术）学院）
• School of Physics, Hangzhou Normal University（杭州师范大学物理学院）

机构由 AI 辅助整理，请以论文原文为准。

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5 pages, 3 figures