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| Main Authors: | , |
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| Format: | Preprint |
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2024
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| Online Access: | https://arxiv.org/abs/2406.00742 |
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| _version_ | 1866929601562804224 |
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| author | Ignsat'ev, Yu. G. Kokh, I. A. |
| author_facet | Ignsat'ev, Yu. G. Kokh, I. A. |
| contents | Numerical modeling of a mathematical model of the cosmological evolution of an asymmetric scalar doublet with kinetic interaction between the components was carried out. A wide range of values of fundamental parameters and initial conditions of the model are considered. Various types of behavior have been identified: models with an infinite inflationary past and future - with and without a rebound point, models with a finite past and infinite future, with an infinite past and finite future (Big Rip), as well as models with a finite past and future. Based on numerical analysis, the behavior of models near the initial singularity and the Big Rip is studied; it is shown that in both cases the barotropic coefficient tends to unity, which corresponds to an extremely rigid state of matter near singularities. A numerical example of the cosmological generation of the classical component of a scalar doublet by its phantom component is given. An assessment was made of the creation of the velocity of fermion pairs by a scalar field near the rebound points and it was shown that a scalar field at the cold stage of the Universe can ensure the creation of the required number of massive scalarly charged fermions. Keywords: cosmological model, phantom and classical scalar fields, quality analysis, asymptotic behavior, numerical modelling, scalar field generation, types of behavior. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2406_00742 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Cosmological models based on an asymmetric scalar doublet with kinetic coupling of components. II. Numerical modeling Ignsat'ev, Yu. G. Kokh, I. A. General Relativity and Quantum Cosmology Numerical modeling of a mathematical model of the cosmological evolution of an asymmetric scalar doublet with kinetic interaction between the components was carried out. A wide range of values of fundamental parameters and initial conditions of the model are considered. Various types of behavior have been identified: models with an infinite inflationary past and future - with and without a rebound point, models with a finite past and infinite future, with an infinite past and finite future (Big Rip), as well as models with a finite past and future. Based on numerical analysis, the behavior of models near the initial singularity and the Big Rip is studied; it is shown that in both cases the barotropic coefficient tends to unity, which corresponds to an extremely rigid state of matter near singularities. A numerical example of the cosmological generation of the classical component of a scalar doublet by its phantom component is given. An assessment was made of the creation of the velocity of fermion pairs by a scalar field near the rebound points and it was shown that a scalar field at the cold stage of the Universe can ensure the creation of the required number of massive scalarly charged fermions. Keywords: cosmological model, phantom and classical scalar fields, quality analysis, asymptotic behavior, numerical modelling, scalar field generation, types of behavior. |
| title | Cosmological models based on an asymmetric scalar doublet with kinetic coupling of components. II. Numerical modeling |
| topic | General Relativity and Quantum Cosmology |
| url | https://arxiv.org/abs/2406.00742 |