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| Main Authors: | , , , |
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| Format: | Preprint |
| Published: |
2025
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| Subjects: | |
| Online Access: | https://arxiv.org/abs/2504.11955 |
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| _version_ | 1866908322282602496 |
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| author | Fabris, Júlio C. Guimarães, Luiz Filipe Pinto-Neto, Nelson Daouda, Mahamadou Hamani |
| author_facet | Fabris, Júlio C. Guimarães, Luiz Filipe Pinto-Neto, Nelson Daouda, Mahamadou Hamani |
| contents | The quantization of unimodular gravity in minisuperspace leads to a time evolution of states generated by the Hamiltonian, as in usual quantum mechanics. We revisit the analysis made in Ref. \cite{unruh}, extending it to phantom scalar fields. It is argued that only in this case a non-trivial evolution for the scalar field can be obtained. The behavior of the scale factor presents a bounce followed by a de Sitter expansion, reproducing the quantum cosmological scenario in General Relativity when the source is given by a cosmological term described by the Schutz variable. The analysis is extended to the Brans-Dicke scalar tensor theory. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2504_11955 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Revisiting Unimodular Quantum Cosmology Fabris, Júlio C. Guimarães, Luiz Filipe Pinto-Neto, Nelson Daouda, Mahamadou Hamani General Relativity and Quantum Cosmology High Energy Physics - Theory The quantization of unimodular gravity in minisuperspace leads to a time evolution of states generated by the Hamiltonian, as in usual quantum mechanics. We revisit the analysis made in Ref. \cite{unruh}, extending it to phantom scalar fields. It is argued that only in this case a non-trivial evolution for the scalar field can be obtained. The behavior of the scale factor presents a bounce followed by a de Sitter expansion, reproducing the quantum cosmological scenario in General Relativity when the source is given by a cosmological term described by the Schutz variable. The analysis is extended to the Brans-Dicke scalar tensor theory. |
| title | Revisiting Unimodular Quantum Cosmology |
| topic | General Relativity and Quantum Cosmology High Energy Physics - Theory |
| url | https://arxiv.org/abs/2504.11955 |