Cosmological entanglement of initial multipartite states
Abstract In this study, we investigate the intricate interplay between the entanglement entropy of initial multipartite states characterized by a nonzero particle number q and the dynamics of an expanding universe. Our analysis demonstrates that spacetime expansion significantly enhances the particl...
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| Format: | Article |
| Language: | English |
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SpringerOpen
2025-08-01
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| Series: | European Physical Journal C: Particles and Fields |
| Online Access: | https://doi.org/10.1140/epjc/s10052-025-14605-z |
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| author | Xiao-Ying Jiang Xiao-Li Huang Shu-Min Wu |
| author_facet | Xiao-Ying Jiang Xiao-Li Huang Shu-Min Wu |
| author_sort | Xiao-Ying Jiang |
| collection | DOAJ |
| description | Abstract In this study, we investigate the intricate interplay between the entanglement entropy of initial multipartite states characterized by a nonzero particle number q and the dynamics of an expanding universe. Our analysis demonstrates that spacetime expansion significantly enhances the particle production rate associated with such states, yielding an amplification factor of $$q + 1 + \frac{q}{|\beta |^2}$$ q + 1 + q | β | 2 compared to the vacuum scenario. This result indicates that the presence of multipartite excitations in the asymptotic past leads to markedly increased cosmological particle generation in the asymptotic future. Furthermore, we show that the entanglement entropy of these states grows substantially under expansion, far surpassing the entropy arising from vacuum fluctuations alone. These findings suggest that multipartite initial states serve as highly effective probes for encoding and extracting information about the dynamical history of spacetime. |
| format | Article |
| id | doaj-art-5d30a1db648a4aff9fa4e5ee00af9267 |
| institution | Kabale University |
| issn | 1434-6052 |
| language | English |
| publishDate | 2025-08-01 |
| publisher | SpringerOpen |
| record_format | Article |
| series | European Physical Journal C: Particles and Fields |
| spelling | doaj-art-5d30a1db648a4aff9fa4e5ee00af92672025-08-20T04:03:01ZengSpringerOpenEuropean Physical Journal C: Particles and Fields1434-60522025-08-018581810.1140/epjc/s10052-025-14605-zCosmological entanglement of initial multipartite statesXiao-Ying Jiang0Xiao-Li Huang1Shu-Min Wu2Department of Physics, Liaoning Normal UniversityDepartment of Physics, Liaoning Normal UniversityDepartment of Physics, Liaoning Normal UniversityAbstract In this study, we investigate the intricate interplay between the entanglement entropy of initial multipartite states characterized by a nonzero particle number q and the dynamics of an expanding universe. Our analysis demonstrates that spacetime expansion significantly enhances the particle production rate associated with such states, yielding an amplification factor of $$q + 1 + \frac{q}{|\beta |^2}$$ q + 1 + q | β | 2 compared to the vacuum scenario. This result indicates that the presence of multipartite excitations in the asymptotic past leads to markedly increased cosmological particle generation in the asymptotic future. Furthermore, we show that the entanglement entropy of these states grows substantially under expansion, far surpassing the entropy arising from vacuum fluctuations alone. These findings suggest that multipartite initial states serve as highly effective probes for encoding and extracting information about the dynamical history of spacetime.https://doi.org/10.1140/epjc/s10052-025-14605-z |
| spellingShingle | Xiao-Ying Jiang Xiao-Li Huang Shu-Min Wu Cosmological entanglement of initial multipartite states European Physical Journal C: Particles and Fields |
| title | Cosmological entanglement of initial multipartite states |
| title_full | Cosmological entanglement of initial multipartite states |
| title_fullStr | Cosmological entanglement of initial multipartite states |
| title_full_unstemmed | Cosmological entanglement of initial multipartite states |
| title_short | Cosmological entanglement of initial multipartite states |
| title_sort | cosmological entanglement of initial multipartite states |
| url | https://doi.org/10.1140/epjc/s10052-025-14605-z |
| work_keys_str_mv | AT xiaoyingjiang cosmologicalentanglementofinitialmultipartitestates AT xiaolihuang cosmologicalentanglementofinitialmultipartitestates AT shuminwu cosmologicalentanglementofinitialmultipartitestates |