Extended tachyon field using form invariance symmetry
In this work we illustrate how form-invariance transformations (FITs) can be used to construct phantom and complementary tachyon cosmologies from standard tachyon field universes. First we show how these transformations act on the Hubble expansion rate, and the energy density and pressure of the tac...
Guardado en:
Publicado: |
2014
|
---|---|
Acceso en línea: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_15507998_v90_n2_p_SanchezG http://hdl.handle.net/20.500.12110/paper_15507998_v90_n2_p_SanchezG |
Aporte de: |
id |
paper:paper_15507998_v90_n2_p_SanchezG |
---|---|
record_format |
dspace |
spelling |
paper:paper_15507998_v90_n2_p_SanchezG2023-06-08T16:22:48Z Extended tachyon field using form invariance symmetry In this work we illustrate how form-invariance transformations (FITs) can be used to construct phantom and complementary tachyon cosmologies from standard tachyon field universes. First we show how these transformations act on the Hubble expansion rate, and the energy density and pressure of the tachyon field. Then we use the FIT to generate three different families of the tachyon field. In other words, the FIT generates new cosmologies from a known "seed" one; in particular, we apply the FIT to the ordinary tachyon field to obtain two types of tachyon species, denoted as the phantom and complementary tachyons. We see that the FIT allows us to pass from a nonstable cosmology to a stable one and vice versa. Finally, as an example, we apply the transformations to an inverse-square potential, V φ-2, and generate the extended tachyon field. © 2014 American Physical Society. 2014 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_15507998_v90_n2_p_SanchezG http://hdl.handle.net/20.500.12110/paper_15507998_v90_n2_p_SanchezG |
institution |
Universidad de Buenos Aires |
institution_str |
I-28 |
repository_str |
R-134 |
collection |
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
description |
In this work we illustrate how form-invariance transformations (FITs) can be used to construct phantom and complementary tachyon cosmologies from standard tachyon field universes. First we show how these transformations act on the Hubble expansion rate, and the energy density and pressure of the tachyon field. Then we use the FIT to generate three different families of the tachyon field. In other words, the FIT generates new cosmologies from a known "seed" one; in particular, we apply the FIT to the ordinary tachyon field to obtain two types of tachyon species, denoted as the phantom and complementary tachyons. We see that the FIT allows us to pass from a nonstable cosmology to a stable one and vice versa. Finally, as an example, we apply the transformations to an inverse-square potential, V φ-2, and generate the extended tachyon field. © 2014 American Physical Society. |
title |
Extended tachyon field using form invariance symmetry |
spellingShingle |
Extended tachyon field using form invariance symmetry |
title_short |
Extended tachyon field using form invariance symmetry |
title_full |
Extended tachyon field using form invariance symmetry |
title_fullStr |
Extended tachyon field using form invariance symmetry |
title_full_unstemmed |
Extended tachyon field using form invariance symmetry |
title_sort |
extended tachyon field using form invariance symmetry |
publishDate |
2014 |
url |
https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_15507998_v90_n2_p_SanchezG http://hdl.handle.net/20.500.12110/paper_15507998_v90_n2_p_SanchezG |
_version_ |
1768545945849430016 |