Abstract
We show that Minkowski single-particle states localized beyond the horizon modify the Unruh thermal distribution in an accelerated frame. This means that, contrary to classical predictions, accelerated observers can reveal particles emitted beyond the horizon. The method we adopt is based on deriving the explicit Wigner characteristic function for the complete description of the quantum field in the noninertial frame and can be generalized to general states.Received 1 December 2021Revised 9 March 2022Accepted 21 March 2023DOI:https://doi.org/10.1103/PhysRevA.107.L030203©2023 American Physical SocietyPhysics Subject Headings (PhySH)Research AreasUnruh effectAtomic, Molecular & Optical
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