From global time to local physics
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arXiv
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| Main Authors: | , , |
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| Format: | Preprint |
| Published: |
2024
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| _version_ | 1866913426991742976 |
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| author | Hassan, Syed Moeez Husain, Viqar Qureshi, Babar |
| author_facet | Hassan, Syed Moeez Husain, Viqar Qureshi, Babar |
| contents | Global time is a gauge or relational choice of time variable in canonical gravity. Local time is the time used in a flat patch of spacetime. We compare the dynamics of a scalar field with respect to choices of global time and Minkowski patch time in an expanding cosmology. Our main results are that evolutions starting from the same initial conditions are similar on the time scales of terrestrial experiments, and that global time leads to a mechanism for evolving coupling constants. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2407_08283 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | From global time to local physics Hassan, Syed Moeez Husain, Viqar Qureshi, Babar General Relativity and Quantum Cosmology Global time is a gauge or relational choice of time variable in canonical gravity. Local time is the time used in a flat patch of spacetime. We compare the dynamics of a scalar field with respect to choices of global time and Minkowski patch time in an expanding cosmology. Our main results are that evolutions starting from the same initial conditions are similar on the time scales of terrestrial experiments, and that global time leads to a mechanism for evolving coupling constants. |
| title | From global time to local physics |
| topic | General Relativity and Quantum Cosmology |
| url | https://arxiv.org/abs/2407.08283 |