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| Format: | Artículo científico |
| Language: | en |
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Sociedade Brasileira de Física
2004
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| Online Access: | https://www.redalyc.org/articulo.oa?id=46434612 |
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| _version_ | 1866811721302147072 |
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| author | G. M. Kremer |
| author_facet | G. M. Kremer |
| contents | Irreversible processes and the accelerated-decelerated phases of the universe G. M. Kremer M. C. N. Silva Teixeira da Física, Astronomía y Matemáticas A model for the Universe is proposed where it is considered as a mixture of scalar and matter fields. Theparticle production is due to an irreversible transfer of energy from the gravitational field to the matter fieldand represented by a non-equilibrium pressure. This model can simulate three distinct periods of the Universe:(a) an accelerated epoch where the energy density of the scalar field prevails over that of the matter field, (b) apast decelerated period where the energy density of the matter field becomes larger than the scalar field energydensity, and (c) a present acceleration phase where the scalar field energy density overcomes the energy densityof the matter field. 2004 artículo científico 0103-9733 https://www.redalyc.org/articulo.oa?id=46434612 en http://www.redalyc.org/revista.oa?id=464 Brazilian Journal of Physics application/pdf Sociedade Brasileira de Física Brazilian Journal of Physics (Brasil) Num.3B Vol.34 |
| format | Artículo científico |
| id | redalyc_46434612 |
| language | en |
| publishDate | 2004 |
| publisher | Sociedade Brasileira de Física |
| spellingShingle | Irreversible processes and the accelerated-decelerated phases of the universe G. M. Kremer Física, Astronomía y Matemáticas Irreversible processes and the accelerated-decelerated phases of the universe G. M. Kremer M. C. N. Silva Teixeira da Física, Astronomía y Matemáticas A model for the Universe is proposed where it is considered as a mixture of scalar and matter fields. Theparticle production is due to an irreversible transfer of energy from the gravitational field to the matter fieldand represented by a non-equilibrium pressure. This model can simulate three distinct periods of the Universe:(a) an accelerated epoch where the energy density of the scalar field prevails over that of the matter field, (b) apast decelerated period where the energy density of the matter field becomes larger than the scalar field energydensity, and (c) a present acceleration phase where the scalar field energy density overcomes the energy densityof the matter field. 2004 artículo científico 0103-9733 https://www.redalyc.org/articulo.oa?id=46434612 en http://www.redalyc.org/revista.oa?id=464 Brazilian Journal of Physics application/pdf Sociedade Brasileira de Física Brazilian Journal of Physics (Brasil) Num.3B Vol.34 |
| title | Irreversible processes and the accelerated-decelerated phases of the universe |
| topic | Física, Astronomía y Matemáticas |
| url | https://www.redalyc.org/articulo.oa?id=46434612 |