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arXiv · 2603.26121

Probing Unruh Effect from Enhanced Decoherence

Ran Li·Zhong-Xiao Man·Jin Wang
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Abstract

We investigate the decoherence of an Unruh-DeWitt detector coupled to scalar, electromagnetic, and spinor fields in four-dimensional Minkowski spacetime. By employing the Schwinger-Keldysh influence functional formalism, we derive a universal scaling law relating the decoherence rate to the proper acceleration $a$ and the scaling dimension $\Delta$ of the environmental field operator. By analyzing both sharp (top-hat) and smooth Gaussian switching functions, it is shown that the decoherence rate in the asymptotic long-time limit scales as $a^{2\Delta-1}$. This scaling indicates that increasing scaling dimension of the coupling field operators can significantly enhance the decoherence, thereby providing a more sensitive probe of the Unruh effect.

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Ran Li, Zhong-Xiao Man, Jin Wang. 2026-03-27. Probing Unruh Effect from Enhanced Decoherence. https://arxiv.org/abs/2603.26121

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