Cosmological wave maps
| Autor: | John Miritzis, Spiros Cotsakis, Koralia Tzanni |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
Physics
General Relativity and Quantum Cosmology Nuclear and High Energy Physics Theoretical physics Gravity (chemistry) Scalar (mathematics) FOS: Physical sciences Astronomy and Astrophysics Acceleration (differential geometry) General Relativity and Quantum Cosmology (gr-qc) Geometric framework Atomic and Molecular Physics and Optics |
| Zdroj: | International Journal of Modern Physics A. 34:1950092 |
| ISSN: | 1793-656X 0217-751X |
| DOI: | 10.1142/s0217751x19500921 |
| Popis: | We consider theories of gravity that include many coupled scalar fields with arbitrary couplings, in the geometric framework of wave maps. We examine the possibility of obtaining acceptable cosmological solutions without the inclusion of a potential term to the scalar fields. To illustrate the theory, we study two simple models and compare their solutions to those in General Relativity. We also address the issue of the conditions that must be satisfied by the wave maps for an accelerated phase of the Universe. 13 pages, 2 figures. To appear in IJMPA |
| Databáze: | OpenAIRE |
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