Cosmological perturbations of Friedmann-Robertson-Walker solutions in ghost free massive bigravity, including also a second matter sector, are studied in detail. At early time, we find that subhorizon exponential instabilities are unavoidable and they lead to a premature departure from the perturbative regime of cosmological perturbations.
Titolo: | FRW cosmological perturbations in massive bigravity | |
Autori: | ||
Data di pubblicazione: | 2014 | |
Rivista: | ||
Abstract: | Cosmological perturbations of Friedmann-Robertson-Walker solutions in ghost free massive bigravity, including also a second matter sector, are studied in detail. At early time, we find that subhorizon exponential instabilities are unavoidable and they lead to a premature departure from the perturbative regime of cosmological perturbations. | |
Handle: | http://hdl.handle.net/11697/16367 | |
Appare nelle tipologie: | 1.1 Articolo in rivista |
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