Time Asymmetry of Cosmic Background Evolution in Loop Quantum Cosmology
| Autor: | Jiun-Huei Proty Wu, Wen-Hsuan Lucky Chang |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2018 |
| Předmět: |
Physics
COSMIC cancer database Cosmology and Nongalactic Astrophysics (astro-ph.CO) 010308 nuclear & particles physics media_common.quotation_subject FOS: Physical sciences Model parameters General Relativity and Quantum Cosmology (gr-qc) 01 natural sciences Asymmetry General Relativity and Quantum Cosmology Formalism (philosophy of mathematics) 0103 physical sciences 010306 general physics Quantum Scalar field Loop quantum cosmology Mathematical physics media_common Astrophysics - Cosmology and Nongalactic Astrophysics |
| Popis: | We discuss the asymmetry of cosmic background evolution in time with respect to the quantum bounce in the Loop Quantum Cosmology (LQC), employing the value of scalar field at the bounce $\phi_{\rm B}$. We use the Chaotic and the $R^2$ potentials to demonstrate that a possible deflation before the bounce may counteract the inflation that is needed for resolving the cosmological conundrums, so a certain level of time asymmetry is required for the models in LQC. This $\phi_{\rm B}$ is model dependent and closely related to the amounts of deflation and inflation, so we may use observations to confine $\phi_{\rm B}$ and thus the model parameters. With further studies this formalism should be useful in providing an observational testbed for the LQC models. Comment: 7 pages, with 7 figures and 4 tables |
| Databáze: | OpenAIRE |
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