Does anti-Unruh effect assist quantum entanglement and coherence?

Abstract

In this paper, we use the concepts of quantum entanglement and coherence to analyze the Unruh and anti-Unruh effects based on the model of Unruh-DeWitt detector. For the first time, we find that (i) the Unruh effect reduces quantum entanglement but enhances quantum coherence; (ii) the anti-Unruh effect enhances quantum entanglement but reduces quantum coherence. This surprising result refutes the notion that the Unruh effect can only destroy quantum entanglement and coherence simultaneously, and that the anti-Unruh can only protect quantum resources. Consequently, it opens up a new source for discovering experimental evidence supporting the existence of the Unruh and anti-Unruh effects.

Nonlocal coherence harvesting from quantum vacuum

“…In other words, there is no global tripartite l 1 -norm of coherence harvesting from the quantum vacuum. Although both papers are devoted to the study of coherence and entanglement in the Unruh-DeWitt model, we will show the substantial differences between this paper and the reference [65]. On the one hand, the distance between the detectors in the reference [65] is very far, while the distance between the detectors in this paper is relatively close.…”

“…Although both papers are devoted to the study of coherence and entanglement in the Unruh-DeWitt model, we will show the substantial differences between this paper and the reference [65]. On the one hand, the distance between the detectors in the reference [65] is very far, while the distance between the detectors in this paper is relatively close. On the other hand, the reference [65] discusses the effect of acceleration on coherence and entanglement when the two detectors are initially entangled, while this paper discusses the influence of detector separation on coherence and entanglement when two detectors are not entangled at the beginning.…”

Quantum nonlocality phenomena in scalar and Dirac fields near a Schwarzschild black hole

“…The states corresponding to mode |n⟩ B must be described in the coordinates of the black hole to characterize Bob's observations. By employing equations ( 19) and (20), equation (31), one can rephras in the light of Minkowski modes for Alice and black hole modes for Bob. Since the exterior region is causally disconnected from the interior region of the black hole, the physical correlation stems from Alice and the exterior region for Bob.…”

“…Quantum nonlocal states are a subset of entangled states, with unique and nuanced physical structures. Therefore, investigating whether the characteristics of quantum nonlocality resemble those of quantum entanglement in relativistic settings is imperative [18][19][20]. In this study, we examine how the Hawking effect influences the quantum nonlocality of scalar and Dirac fields in Schwarzschild spacetime.…”