Exact solutions and stability of a nonlinear scalar field in a Petrov Type D cosmology
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| Autoři: | , |
|---|---|
| Médium: | artículo original |
| Stav: | Versión publicada |
| Datum vydání: | 2025 |
| Popis: | We present analytical solutions for a universe with a scalar field equivalent to a mixture of three perfect fluids: dark energy, dust and stiff matter. The space-time is an anisotropic and homogenous universe of Petrov Type D that expands isotropically in two spatial axes. We also determine the singularities with the Kretschmann scalar, the Hubble parameter, the deceleration parameter, and the temperature in terms of time. Finally, we study the Jacobi stability of the universe with the scalar field and conclude that the model is stable at all times. |
| Země: | Portal de Revistas UCR |
| Instituce: | Universidad de Costa Rica |
| Repositorio: | Portal de Revistas UCR |
| Jazyk: | Inglés |
| OAI Identifier: | oai:portal.revistas.ucr.ac.cr:article/738 |
| On-line přístup: | https://revistas.ucr.ac.cr/index.php/rmatematica/article/view/738 |
| Klíčové slovo: | Cosmology Exact solution Scalar field Einstein’s equations Temperature Hubble Deceleration parameter Kretschmann Singularity Jacobi stability Cosmología Solución exacta Campo escalar Ecuaciones de Einstein Temperatura Parámetro de deceleración Singularidad Estabilidad de Jacobi |