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arXiv:2607.17216

Relativistic quantum teleportation protected by the anti-Unruh effect

Reza Hamzehofi, Davood Afshar, Mehrzad Ashrafpour

quant-phgr-qcSubmitted Jul 19, 2026• Announced Jul 21, 2026• 0 citations

v1 · Jul 19, 2026 v2 · Aug 20, 2026

Abstract

We investigate standard quantum teleportation in a relativistic setting where one participant, Rob, undergoes uniform acceleration while Alice remains inertial. Rob interacts locally with a massive scalar field modeled by an Unruh-DeWitt detector. We show that for small detector energy gaps, the entanglement shared between Alice and Rob increases monotonically with acceleration. For larger gaps, entanglement initially decreases at low accelerations due to the Unruh effect, but is subsequently restored and enhanced at higher accelerations as a consequence of the anti-Unruh effect. This behavior is associated with a reduction of the effective detector temperature, leading to a recovery of quantum coherence previously lost to the field. As a result, the teleportation fidelity increases with acceleration and approaches unity in the high-acceleration regime. Our results demonstrate that the anti-Unruh effect can protect and recover quantum information, providing a potential mechanism to mitigate relativistic degradation of quantum correlations.

Comments: 13 pages, 2 figures, 2 tables

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\mathsf{X}

-type state, Alice stays stationary, while Rob is uniformly accelerated with respect to Alice. We additionally study the system-environment dynamics in the noninertial frames, i.e., the

\mathsf{X}

-type state shared between Alice and Rob interacts with the environment via amplitude damping channel. Our results demonstrate a monogamy relation of the fidelity with acceleration and amplitude damping channel, these result suggest that the fidelity of quantum teleportation cannot be enhanced simultaneously by both the acceleration and amplitude damping channel. Such a property may have potential applications in protecting the fidelity of quantum teleportation performed by observers in relative motion.

Abstract We study, in the framework of open quantum systems, the entanglement dynamics for a quantum system composed of two uniformly accelerated Unruh-Dewitt detectors interacting with a bath of massive scalar fields in the Minkowski vacuum. We find that the entanglement evolution for the quantum system coupled with massive fields is always slower compared with that of the one coupled with massless fields, and this time-delay effect brought about by the field being massive can however be counteracted by a large enough acceleration, in contrast to the case of a static quantum system in a thermal bath, where this time delay is not affected by the temperature. Remarkably, the maximal concurrence of the quantum system generated during evolution may increase with acceleration for any inter-detector separation while that for static ones in a thermal bath decreases monotonically with temperature, and this can be considered as an anti-Unruh effect in terms of the entanglement generated.