Cosmological model with fermion and tachyon fields interacting via Yukawa-type potential
| Autor: | Gilberto M. Kremer, Marlos O. Ribas, F. P. Devecchi |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
Physics
Nuclear and High Energy Physics Cosmology and Nongalactic Astrophysics (astro-ph.CO) Fermionic field 010308 nuclear & particles physics Yukawa potential FOS: Physical sciences General Physics and Astronomy Astronomy and Astrophysics General Relativity and Quantum Cosmology (gr-qc) Fermion Inflaton 01 natural sciences General Relativity and Quantum Cosmology symbols.namesake Coupling (physics) Tachyon Quantum electrodynamics 0103 physical sciences Dark energy symbols Tachyonic field 010306 general physics Astrophysics - Cosmology and Nongalactic Astrophysics |
| Zdroj: | Modern Physics Letters A. 31:1650039 |
| ISSN: | 1793-6632 0217-7323 |
| Popis: | A model for the universe with tachyonic and fermionic fields interacting through a Yukawa-type potential is investigated. It is shown that the tachyonic field answers for the initial accelerated regime and for the subsequent decelerated regime so that it behaves as an inflaton at early times and as a matter field at intermediate times, while the fermionic field has the role of a dark energy constituent, since it leads to an accelerated regime at later times. The interaction between the fields via a Yukawa-type potential controls the duration of the decelerated era, since a stronger coupling makes a shorter decelerated period. 9 pages, 1 figure |
| Databáze: | OpenAIRE |
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