Persistence of measurement-induced nonlocality in uniformly accelerating Unruh-DeWitt detectors

• URL: http://arxiv.org/abs/2609.08653v1
• Date: Tue, 08 Sep 2026 12:23:02 GMT
• Title: Persistence of measurement-induced nonlocality in uniformly accelerating Unruh-DeWitt detectors
• Abstract summary: Uniform acceleration induces a thermal response to the Minkowski vacuum.<n>Previous analyses of bosonic fields found that it decreases with increasing acceleration and vanishes in the infinite-acceleration limit.<n>We find that the response of MIN to the Unruh temperature depends sensitively on the initial detector state.
• Score: 2.006592358907474
• License: http://creativecommons.org/publicdomain/zero/1.0/
• Abstract: 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.

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