Saved in:
| Main Authors: | , , |
|---|---|
| Format: | Preprint |
| Published: |
2021
|
| Subjects: | |
| Online Access: | https://arxiv.org/abs/2111.01358 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1866910864033972224 |
|---|---|
| author | Wang, Jiafan Zhang, Jingjun Feng, Jun |
| author_facet | Wang, Jiafan Zhang, Jingjun Feng, Jun |
| contents | In this paper, we investigate the quantum coherence extraction {between} two accelerating Unruh-DeWitt detectors, coupling to a scalar field in $(3+1)$-dimensional Minkowski spacetime. We find that quantum coherence as a nonclassical correlation can be generated through the Markovian evolution of the {detector} system, just like quantum entanglement. However, with growing Unruh temperature, in contrast to monotonously degrading entanglement, we find that quantum coherence exhibits a striking revival phenomenon. For certain detectors' initial state choices, {the} coherence measure will reduce to zero at first {and} then grow to an asymptotic value. We verify such coherence revival by inspecting its metrological advantage on the quantum Fisher information (QFI) enhancement. Since the maximal QFI {bounds} the accuracy of quantum parameter estimation, we conclude that the extracted coherence can be utilized as a physical resource in quantum metrology. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2111_01358 |
| institution | arXiv |
| publishDate | 2021 |
| record_format | arxiv |
| spellingShingle | Coherence revival under the Unruh effect and its metrological advantage Wang, Jiafan Zhang, Jingjun Feng, Jun High Energy Physics - Theory Quantum Physics In this paper, we investigate the quantum coherence extraction {between} two accelerating Unruh-DeWitt detectors, coupling to a scalar field in $(3+1)$-dimensional Minkowski spacetime. We find that quantum coherence as a nonclassical correlation can be generated through the Markovian evolution of the {detector} system, just like quantum entanglement. However, with growing Unruh temperature, in contrast to monotonously degrading entanglement, we find that quantum coherence exhibits a striking revival phenomenon. For certain detectors' initial state choices, {the} coherence measure will reduce to zero at first {and} then grow to an asymptotic value. We verify such coherence revival by inspecting its metrological advantage on the quantum Fisher information (QFI) enhancement. Since the maximal QFI {bounds} the accuracy of quantum parameter estimation, we conclude that the extracted coherence can be utilized as a physical resource in quantum metrology. |
| title | Coherence revival under the Unruh effect and its metrological advantage |
| topic | High Energy Physics - Theory Quantum Physics |
| url | https://arxiv.org/abs/2111.01358 |