Bose-Einstein Condensates have been recently proposed as dark matter candidates. In order to characterize the phenomenology associated to such models, we extend previous investigations by studying the general case of a relativistic BEC on a curved background including a non-minimal coupling to curvature. In particular, we discuss the possibility of a two phase cosmological evolution: a cold dark matter-like phase at the large scales/early times and a condensed phase inside dark matter halos. During the first phase dark matter is described by a minimally coupled weakly self-interacting scalar field, while in the second one dark matter condensates and, we shall argue, develops as a consequence the non-minimal coupling. Finally, we discuss how such non-minimal coupling could provide a new mechanism to address cold dark matter paradigm issues at galactic scales.
|Titolo:||Dark matter as a Bose-Einstein Condensate: the relativistic non-minimally coupled case|
|Autori:||Bettoni, D.; Colombo, M.; Liberati, S.|
|Rivista:||JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS|
|Data di pubblicazione:||2014|
|Digital Object Identifier (DOI):||10.1088/1475-7516/2014/02/004|
|Appare nelle tipologie:||1.1 Journal article|