Does acceleration always degrade quantum entanglement for tetrapartite Unruh-DeWitt detectors?
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arXiv
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| Format: | Preprint |
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2025
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| _version_ | 1866908381763076096 |
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| author | Li, Si-Han Shang, Si-Han Wu, Shu-Min |
| author_facet | Li, Si-Han Shang, Si-Han Wu, Shu-Min |
| contents | Previous studies have shown that the Unruh effect completely destroys quantum entanglement and coherence of bipartite states, as modeled by entangled Unruh-DeWitt detectors. But does the Unruh effect have a different impact on quantum entanglement of multipartite states within this framework? In this paper, we investigate the influence of the Unruh effect on $1-3$ entanglement in the context of entangled tetrapartite Unruh-DeWitt detectors. We find that quantum entanglement of tetrapartite $W$ state first decreases to a minimum value and then increases to a fixed value with the growth of the acceleration. This indicates that the Unruh effect can, under certain conditions, enhance quantum entanglement. In other words, the Unruh effect plays a dual role in the behavior of quantum entanglement-both diminishing and enhancing it. This discovery challenges and overturns the traditional view that the Unruh effect is solely detrimental to quantum entanglement and coherence in entangled Unruh-DeWitt detectors, offering a fresh and profound perspective on its impact. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2502_05881 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Does acceleration always degrade quantum entanglement for tetrapartite Unruh-DeWitt detectors? Li, Si-Han Shang, Si-Han Wu, Shu-Min General Relativity and Quantum Cosmology Previous studies have shown that the Unruh effect completely destroys quantum entanglement and coherence of bipartite states, as modeled by entangled Unruh-DeWitt detectors. But does the Unruh effect have a different impact on quantum entanglement of multipartite states within this framework? In this paper, we investigate the influence of the Unruh effect on $1-3$ entanglement in the context of entangled tetrapartite Unruh-DeWitt detectors. We find that quantum entanglement of tetrapartite $W$ state first decreases to a minimum value and then increases to a fixed value with the growth of the acceleration. This indicates that the Unruh effect can, under certain conditions, enhance quantum entanglement. In other words, the Unruh effect plays a dual role in the behavior of quantum entanglement-both diminishing and enhancing it. This discovery challenges and overturns the traditional view that the Unruh effect is solely detrimental to quantum entanglement and coherence in entangled Unruh-DeWitt detectors, offering a fresh and profound perspective on its impact. |
| title | Does acceleration always degrade quantum entanglement for tetrapartite Unruh-DeWitt detectors? |
| topic | General Relativity and Quantum Cosmology |
| url | https://arxiv.org/abs/2502.05881 |