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arXiv · 2512.23892

Unruh effect and quantum entanglement for the non-uniform Rindler spacetime

Manuel de Atocha Rodríguez Fernández·Alexander I. Nesterov·Gennady P. Berman·C. Moreno-González
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Abstract

While the Unruh effect has traditionally been studied under the assumption of uniform acceleration, a simplification motivated by experimental considerations, it is not necessarily true for all non-inertial motions. We propose a novel approach for the indirect detection of the Unruh effect without relying on the former restriction. Previous studies have shown that probing the decoherence of an Unruh-DeWitt detector can significantly reduce the acceleration required for observing the effect by several orders of magnitude compared to earlier proposals. Building on this idea, we develop a theoretical framework describing a non-inertial observer equipped with a detector undergoing non-uniform, time-dependent acceleration. We show that, in a non-uniformly accelerated Rindler spacetime, the particle distribution perceived in the Minkowski vacuum acquires a time-dependent modification of the standard Unruh spectrum. Furthermore, we demonstrate that the inclusion of quantum entanglement leads to a deformation of the Minkowski vacuum into squeezed states.

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Manuel de Atocha Rodríguez Fernández, Alexander I. Nesterov, Gennady P. Berman, C. Moreno-González. 2025-12-29. Unruh effect and quantum entanglement for the non-uniform Rindler spacetime. https://arxiv.org/abs/2512.23892

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