"Observables" in de Sitter Quantum Gravity: in Perturbation Theory and Beyond
Fuente:
arXiv
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| Autor principal: | |
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| Formato: | Preprint |
| Publicado: |
2024
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| Acceso en línea: | |
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| _version_ | 1866916233710927872 |
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| author | Banks, Tom |
| author_facet | Banks, Tom |
| contents | A review of some errors made by the author and others in their search for quantum models of gravity in cosmological space-times that asymptote to de Sitter (dS) space in the future. The "static de Sitter Hamiltonian", which measures the energy of localized objects in a static patch, is not a conserved quantity. The static time translation diffeomorphism of eternal dS space is a gauge symmetry, and the static energy is an approximate property of meta-stable constrained states. It's not clear whether a theoretical model has to have a time independent Hamiltonian at all, but if it does, its eigenvalues are, {\it in principle}, not accessible to measurement by local detectors. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2405_01773 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | "Observables" in de Sitter Quantum Gravity: in Perturbation Theory and Beyond Banks, Tom High Energy Physics - Theory General Relativity and Quantum Cosmology A review of some errors made by the author and others in their search for quantum models of gravity in cosmological space-times that asymptote to de Sitter (dS) space in the future. The "static de Sitter Hamiltonian", which measures the energy of localized objects in a static patch, is not a conserved quantity. The static time translation diffeomorphism of eternal dS space is a gauge symmetry, and the static energy is an approximate property of meta-stable constrained states. It's not clear whether a theoretical model has to have a time independent Hamiltonian at all, but if it does, its eigenvalues are, {\it in principle}, not accessible to measurement by local detectors. |
| title | "Observables" in de Sitter Quantum Gravity: in Perturbation Theory and Beyond |
| topic | High Energy Physics - Theory General Relativity and Quantum Cosmology |
| url | https://arxiv.org/abs/2405.01773 |