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...

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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
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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
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