Form invariant transformations between n- and m-dimensional flat friedmann-robertson-walker cosmologies
We illustrate how a group of symmetry transformations, which preserve the form of the n-dimensional flat Friedmann-Robertson-Walker cosmologies satisfying Einstein's equations, act in any dimension. This group relates the energy density and the isotropic pressure of the cosmic fluid to the expa...
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| Acceso en línea: | http://hdl.handle.net/20.500.12110/paper_02182718_v17_n11_p1981_Cataldo |
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todo:paper_02182718_v17_n11_p1981_Cataldo2023-10-03T15:10:53Z Form invariant transformations between n- and m-dimensional flat friedmann-robertson-walker cosmologies Cataldo, M. Chimento, L.P. We illustrate how a group of symmetry transformations, which preserve the form of the n-dimensional flat Friedmann-Robertson-Walker cosmologies satisfying Einstein's equations, act in any dimension. This group relates the energy density and the isotropic pressure of the cosmic fluid to the expansion rate. The freedom associated with the dimension of the space-time yields assisted inflation even when the energy density of the fluid is a dimensional invariant and enriches the set of duality transformations leading to phantom cosmologies. © 2008 World Scientific Publishing Company. Fil:Cataldo, M. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Chimento, L.P. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_02182718_v17_n11_p1981_Cataldo |
| institution |
Universidad de Buenos Aires |
| institution_str |
I-28 |
| repository_str |
R-134 |
| collection |
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
| description |
We illustrate how a group of symmetry transformations, which preserve the form of the n-dimensional flat Friedmann-Robertson-Walker cosmologies satisfying Einstein's equations, act in any dimension. This group relates the energy density and the isotropic pressure of the cosmic fluid to the expansion rate. The freedom associated with the dimension of the space-time yields assisted inflation even when the energy density of the fluid is a dimensional invariant and enriches the set of duality transformations leading to phantom cosmologies. © 2008 World Scientific Publishing Company. |
| format |
JOUR |
| author |
Cataldo, M. Chimento, L.P. |
| spellingShingle |
Cataldo, M. Chimento, L.P. Form invariant transformations between n- and m-dimensional flat friedmann-robertson-walker cosmologies |
| author_facet |
Cataldo, M. Chimento, L.P. |
| author_sort |
Cataldo, M. |
| title |
Form invariant transformations between n- and m-dimensional flat friedmann-robertson-walker cosmologies |
| title_short |
Form invariant transformations between n- and m-dimensional flat friedmann-robertson-walker cosmologies |
| title_full |
Form invariant transformations between n- and m-dimensional flat friedmann-robertson-walker cosmologies |
| title_fullStr |
Form invariant transformations between n- and m-dimensional flat friedmann-robertson-walker cosmologies |
| title_full_unstemmed |
Form invariant transformations between n- and m-dimensional flat friedmann-robertson-walker cosmologies |
| title_sort |
form invariant transformations between n- and m-dimensional flat friedmann-robertson-walker cosmologies |
| url |
http://hdl.handle.net/20.500.12110/paper_02182718_v17_n11_p1981_Cataldo |
| work_keys_str_mv |
AT cataldom forminvarianttransformationsbetweennandmdimensionalflatfriedmannrobertsonwalkercosmologies AT chimentolp forminvarianttransformationsbetweennandmdimensionalflatfriedmannrobertsonwalkercosmologies |
| _version_ |
1807319861113651200 |