Anti-Unruh effect in the thermal background

Abstract

We study the influence of the thermal background on the existence of the anti-Unruh effect. For the massless scalar field, we present that the anti-Unruh effect can appear when the detector is accelerated in the thermal field, which is shown to be absent when accelerating in the Minkowski vacuum. For the massive scalar field, it is found that the anti-Unruh effect which exists in the case for accelerated detectors in the vacuum can disappear when the background temperature increases. We use the many-body entangled quantum state to study the situation of the massive scalar field. When the many-body state is accelerated, its entanglement is decreasing with the increase of the background temperature and the phenomenon of the sudden death for entanglement occurs. This provides a valuable indication that the anti-Unruh effect can exist below some specific background temperature, dependent on the actual experimental environment.

arXiv commentAccepted by PRD. arXiv admin note: substantial text overlap with arXiv:2009.05179

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Cited by in corpus (6)

• Circular motion analogue Unruh effect in a $2+1$ thermal bath: Robbing from the rich and giving to the poor
• Effect of spacetime dimensions on quantum entanglement between two uniformly accelerated atoms
• Enhanced anti-Unruh effect by simulated light-matter interactions
• Reveal the lost entanglement for accelerated atoms in the high-dimensional spacetime
• Canonical Quantization of the U(1) Gauge Field in the right Rindler-wedge in the Rindler Coordinates
• Entanglement is protected by acceleration-induced transparency in thermal field