Inflationary attractors and their measures

Alejandro Corichi, David Sloan

Resultado de la investigación: Contribución a una revistaArtículo

23 Citas (Scopus)

Resumen

Several recent misconceptions about the measure problem in inflation and the nature of inflationary attractors are addressed. We clarify some issues regarding the Hamiltonian dynamics of a flat Friedmann-Lemaître-Robertson- Walker cosmology coupled to a massive scalar field. In particular we show that the focusing of the Liouville measure on attractor solutions is recovered by properly dealing with a gauge degree of freedom related to the rescaling of the spatial volume. Furthermore, we show how the Liouville measure formulated on a surface of constant Hubble rate, together with the assumption of constant a priory probability, induces a non-uniform probability distribution function on any other surfaces of other Hubble rates. The attractor behaviour is seen through the focusing of this function on a narrow range of physical observables. This qualitative behaviour is robust under change of potential and underlying measure. One can then conclude that standard techniques from Hamiltonian dynamics suffice to provide a satisfactory description of attractor solutions and the measure problem for inflationary dynamics.

Idioma originalInglés
Número de artículo062001
PublicaciónClassical and Quantum Gravity
Volumen31
N.º6
DOI
EstadoPublicada - 21 mar 2014

Huella dactilar

Hubble constant
probability distribution functions
cosmology
degrees of freedom
scalars

Citar esto

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Inflationary attractors and their measures. / Corichi, Alejandro; Sloan, David.

En: Classical and Quantum Gravity, Vol. 31, N.º 6, 062001, 21.03.2014.

Resultado de la investigación: Contribución a una revistaArtículo

TY - JOUR

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AU - Sloan, David

PY - 2014/3/21

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