Possible existence of time machines in a five-dimensional spacetime
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arXiv
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| Format: | Preprint |
| Published: |
2021
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| _version_ | 1866912306010521600 |
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| author | Kuhfittig, Peter K. F. |
| author_facet | Kuhfittig, Peter K. F. |
| contents | The idea of constructing a time machine is not new and even received a boost thanks to the realization that a traversable wormhole could be converted to a time machine. It was shown in a recent paper that the time-travel paradoxes can be avoided by assuming the existence of two or more histories or parallel timelines. Accordingly, we start with a physically acceptable model, a spacetime that is anti-de Sitter due to an extra time-like dimension. This model allows the existence of closed time-like curves, as well as two different histories, thereby suggesting a possible avoidance of the time-travel paradoxes. By assuming that the extra dimension is independent of the radial coordinate, the wormhole retains its basic geometric properties regardless of its location. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2104_03790 |
| institution | arXiv |
| publishDate | 2021 |
| record_format | arxiv |
| spellingShingle | Possible existence of time machines in a five-dimensional spacetime Kuhfittig, Peter K. F. General Relativity and Quantum Cosmology The idea of constructing a time machine is not new and even received a boost thanks to the realization that a traversable wormhole could be converted to a time machine. It was shown in a recent paper that the time-travel paradoxes can be avoided by assuming the existence of two or more histories or parallel timelines. Accordingly, we start with a physically acceptable model, a spacetime that is anti-de Sitter due to an extra time-like dimension. This model allows the existence of closed time-like curves, as well as two different histories, thereby suggesting a possible avoidance of the time-travel paradoxes. By assuming that the extra dimension is independent of the radial coordinate, the wormhole retains its basic geometric properties regardless of its location. |
| title | Possible existence of time machines in a five-dimensional spacetime |
| topic | General Relativity and Quantum Cosmology |
| url | https://arxiv.org/abs/2104.03790 |