Weak measurements enhancing the quantum information facets of a driven Unruh–DeWitt detector
We developed a Hermitian operator representation of the Unruh channel for a driven accelerated detector in the presence of external noise. This representation is then used to provide a generalized analytical approach to a non-inertial evolution subjected to quantum weak measurements. The quantum inf...
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Frontiers Media S.A.
2025-01-01
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| Series: | Frontiers in Physics |
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| Online Access: | https://www.frontiersin.org/articles/10.3389/fphy.2024.1513241/full |
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| author | Jia-Ling Xie Jia-Ling Xie Cheng-Jie Zhu Jia Tan Xiang Hao |
| author_facet | Jia-Ling Xie Jia-Ling Xie Cheng-Jie Zhu Jia Tan Xiang Hao |
| author_sort | Jia-Ling Xie |
| collection | DOAJ |
| description | We developed a Hermitian operator representation of the Unruh channel for a driven accelerated detector in the presence of external noise. This representation is then used to provide a generalized analytical approach to a non-inertial evolution subjected to quantum weak measurements. The quantum information facets were then improved by performing weak measurements before and after the quantum channel. The external noise was modeled using a phase damping channel. The prominent oscillations of the quantum information are caused by vacuum fluctuations of the quantum fields coupled to the detector. Steady values are obtained for the quantum coherence and quantum Fisher information using the Unruh effect. Thus, quantum weak measurements can effectively suppress the decoherence induced by the relativistic acceleration. By comparing with cases without weak measurements, we demonstrate that there exist some regions with optimal measurement strengths that enhance the quantum coherence and quantum Fisher information. The effects of conditional improvement on the quantum information facets are still obvious in the presence of external noise. |
| format | Article |
| id | doaj-art-f9611a4248174420aed0ceeedbabdded |
| institution | Kabale University |
| issn | 2296-424X |
| language | English |
| publishDate | 2025-01-01 |
| publisher | Frontiers Media S.A. |
| record_format | Article |
| series | Frontiers in Physics |
| spelling | doaj-art-f9611a4248174420aed0ceeedbabdded2025-01-09T05:10:25ZengFrontiers Media S.A.Frontiers in Physics2296-424X2025-01-011210.3389/fphy.2024.15132411513241Weak measurements enhancing the quantum information facets of a driven Unruh–DeWitt detectorJia-Ling Xie0Jia-Ling Xie1Cheng-Jie Zhu2Jia Tan3Xiang Hao4School of Physical Science and Technology, Soochow University, Suzhou, Jiangsu, ChinaSchool of Physical Science and Technology, Suzhou University of Science and Technology, Suzhou, Jiangsu, ChinaSchool of Physical Science and Technology, Soochow University, Suzhou, Jiangsu, ChinaSchool of Physical Science and Technology, Suzhou University of Science and Technology, Suzhou, Jiangsu, ChinaSchool of Physical Science and Technology, Suzhou University of Science and Technology, Suzhou, Jiangsu, ChinaWe developed a Hermitian operator representation of the Unruh channel for a driven accelerated detector in the presence of external noise. This representation is then used to provide a generalized analytical approach to a non-inertial evolution subjected to quantum weak measurements. The quantum information facets were then improved by performing weak measurements before and after the quantum channel. The external noise was modeled using a phase damping channel. The prominent oscillations of the quantum information are caused by vacuum fluctuations of the quantum fields coupled to the detector. Steady values are obtained for the quantum coherence and quantum Fisher information using the Unruh effect. Thus, quantum weak measurements can effectively suppress the decoherence induced by the relativistic acceleration. By comparing with cases without weak measurements, we demonstrate that there exist some regions with optimal measurement strengths that enhance the quantum coherence and quantum Fisher information. The effects of conditional improvement on the quantum information facets are still obvious in the presence of external noise.https://www.frontiersin.org/articles/10.3389/fphy.2024.1513241/fullUnruh channelquantum informationweak measurement and measurement reversalquantum Fisher informationquantum coherence |
| spellingShingle | Jia-Ling Xie Jia-Ling Xie Cheng-Jie Zhu Jia Tan Xiang Hao Weak measurements enhancing the quantum information facets of a driven Unruh–DeWitt detector Frontiers in Physics Unruh channel quantum information weak measurement and measurement reversal quantum Fisher information quantum coherence |
| title | Weak measurements enhancing the quantum information facets of a driven Unruh–DeWitt detector |
| title_full | Weak measurements enhancing the quantum information facets of a driven Unruh–DeWitt detector |
| title_fullStr | Weak measurements enhancing the quantum information facets of a driven Unruh–DeWitt detector |
| title_full_unstemmed | Weak measurements enhancing the quantum information facets of a driven Unruh–DeWitt detector |
| title_short | Weak measurements enhancing the quantum information facets of a driven Unruh–DeWitt detector |
| title_sort | weak measurements enhancing the quantum information facets of a driven unruh dewitt detector |
| topic | Unruh channel quantum information weak measurement and measurement reversal quantum Fisher information quantum coherence |
| url | https://www.frontiersin.org/articles/10.3389/fphy.2024.1513241/full |
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