Harvesting correlations from vacuum quantum fields in the presence of a reflecting boundary
Abstract We explore correlations harvesting by two static detectors locally interacting with vacuum massless scalar fields in the presence of an infinite perfectly reflecting boundary. We study the phenomena of mutual information harvesting and entanglement harvesting for two detector-boundary align...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
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SpringerOpen
2023-11-01
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| Series: | Journal of High Energy Physics |
| Subjects: | |
| Online Access: | https://doi.org/10.1007/JHEP11(2023)184 |
| _version_ | 1797199772587655168 |
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| author | Zhihong Liu Jialin Zhang Hongwei Yu |
| author_facet | Zhihong Liu Jialin Zhang Hongwei Yu |
| author_sort | Zhihong Liu |
| collection | DOAJ |
| description | Abstract We explore correlations harvesting by two static detectors locally interacting with vacuum massless scalar fields in the presence of an infinite perfectly reflecting boundary. We study the phenomena of mutual information harvesting and entanglement harvesting for two detector-boundary alignments, i.e., parallel-to-boundary and orthogonal-to-boundary alignments. Our results show that the presence of the boundary generally inhibits mutual information harvesting relative to that in flat spacetime without any boundaries. In contrast, the boundary may play a doubled-edged role in entanglement harvesting, i.e., inhibiting entanglement harvesting in the near zone of the boundary while assisting it in the far zone of the boundary. Moreover, there exists an optimal detector energy gap difference between two nonidentical detectors that makes such detectors advantageous in correlations harvesting as long as the interdetector separation is large enough. The value of the optimal detector energy gap difference depends on both the interdetector separation and the detector-to-boundary distance. A comparison of the correlations harvesting in two different alignments shows that although correlations harvesting share qualitatively the same properties, they also display quantitative differences in that the detectors in orthogonal-to-boundary alignment always harvest comparatively more mutual information than the parallel-to-boundary ones, while they harvest comparatively more entanglement only near the boundary. |
| first_indexed | 2024-03-09T15:32:17Z |
| format | Article |
| id | doaj.art-8c469a3dc159442bbe6e493d314bc384 |
| institution | Directory Open Access Journal |
| issn | 1029-8479 |
| language | English |
| last_indexed | 2024-04-24T07:21:04Z |
| publishDate | 2023-11-01 |
| publisher | SpringerOpen |
| record_format | Article |
| series | Journal of High Energy Physics |
| spelling | doaj.art-8c469a3dc159442bbe6e493d314bc3842024-04-21T11:05:03ZengSpringerOpenJournal of High Energy Physics1029-84792023-11-0120231112810.1007/JHEP11(2023)184Harvesting correlations from vacuum quantum fields in the presence of a reflecting boundaryZhihong Liu0Jialin Zhang1Hongwei Yu2Department of Physics and Synergetic Innovation Center for Quantum Effects and Applications, Hunan Normal UniversityDepartment of Physics and Synergetic Innovation Center for Quantum Effects and Applications, Hunan Normal UniversityDepartment of Physics and Synergetic Innovation Center for Quantum Effects and Applications, Hunan Normal UniversityAbstract We explore correlations harvesting by two static detectors locally interacting with vacuum massless scalar fields in the presence of an infinite perfectly reflecting boundary. We study the phenomena of mutual information harvesting and entanglement harvesting for two detector-boundary alignments, i.e., parallel-to-boundary and orthogonal-to-boundary alignments. Our results show that the presence of the boundary generally inhibits mutual information harvesting relative to that in flat spacetime without any boundaries. In contrast, the boundary may play a doubled-edged role in entanglement harvesting, i.e., inhibiting entanglement harvesting in the near zone of the boundary while assisting it in the far zone of the boundary. Moreover, there exists an optimal detector energy gap difference between two nonidentical detectors that makes such detectors advantageous in correlations harvesting as long as the interdetector separation is large enough. The value of the optimal detector energy gap difference depends on both the interdetector separation and the detector-to-boundary distance. A comparison of the correlations harvesting in two different alignments shows that although correlations harvesting share qualitatively the same properties, they also display quantitative differences in that the detectors in orthogonal-to-boundary alignment always harvest comparatively more mutual information than the parallel-to-boundary ones, while they harvest comparatively more entanglement only near the boundary.https://doi.org/10.1007/JHEP11(2023)184Boundary Quantum Field TheoryQuantum Dissipative Systems |
| spellingShingle | Zhihong Liu Jialin Zhang Hongwei Yu Harvesting correlations from vacuum quantum fields in the presence of a reflecting boundary Journal of High Energy Physics Boundary Quantum Field Theory Quantum Dissipative Systems |
| title | Harvesting correlations from vacuum quantum fields in the presence of a reflecting boundary |
| title_full | Harvesting correlations from vacuum quantum fields in the presence of a reflecting boundary |
| title_fullStr | Harvesting correlations from vacuum quantum fields in the presence of a reflecting boundary |
| title_full_unstemmed | Harvesting correlations from vacuum quantum fields in the presence of a reflecting boundary |
| title_short | Harvesting correlations from vacuum quantum fields in the presence of a reflecting boundary |
| title_sort | harvesting correlations from vacuum quantum fields in the presence of a reflecting boundary |
| topic | Boundary Quantum Field Theory Quantum Dissipative Systems |
| url | https://doi.org/10.1007/JHEP11(2023)184 |
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