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| Main Authors: | , |
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| Format: | Preprint |
| Published: |
2023
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| Subjects: | |
| Online Access: | https://arxiv.org/abs/2303.01307 |
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| _version_ | 1866911853454557184 |
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| author | Narayan, K. Saini, Hitesh K. |
| author_facet | Narayan, K. Saini, Hitesh K. |
| contents | Following arXiv:2210.12963 [hep-th], we investigate aspects of the time evolution operator regarded as a density operator and associated entanglement-like structures in various quantum systems. These involve timelike separations and generically lead to complex-valued entropy, although there are interesting real subfamilies. There are many parallels and close relations with reduced transition matrices and pseudo-entropy, which we discuss and clarify. For instance, a related quantity involves the time evolution operator along with a projection onto some initial state, which amounts to analysing pseudo-entropy for the initial state and its time-evolved final state. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2303_01307 |
| institution | arXiv |
| publishDate | 2023 |
| record_format | arxiv |
| spellingShingle | Notes on time entanglement and pseudo-entropy Narayan, K. Saini, Hitesh K. High Energy Physics - Theory Following arXiv:2210.12963 [hep-th], we investigate aspects of the time evolution operator regarded as a density operator and associated entanglement-like structures in various quantum systems. These involve timelike separations and generically lead to complex-valued entropy, although there are interesting real subfamilies. There are many parallels and close relations with reduced transition matrices and pseudo-entropy, which we discuss and clarify. For instance, a related quantity involves the time evolution operator along with a projection onto some initial state, which amounts to analysing pseudo-entropy for the initial state and its time-evolved final state. |
| title | Notes on time entanglement and pseudo-entropy |
| topic | High Energy Physics - Theory |
| url | https://arxiv.org/abs/2303.01307 |