Conformal Universe as false vacuum decay

par Prof. Valery RUBAKOV (Institute for Nuclear Research, Russian Academy of Sciences, Moscow)

jeudi 18 juin 2015, 14:15 → 15:15 Europe/Paris

Amphithéâtre Léon Motchane (IHES)

We point out that the (pseudo-)conformal Universe scenario may be realized as decay of conformally invariant, metastable vacuum, which proceeds via spontaneous nucleation and subsequent growth of a bubble of a putative new phase. We study perturbations about the bubble and show that their leading late-time properties coincide with those inherent in the original models with homogeneously rolling backgrounds. In particular, the perturbations of a spectator dimension-zero field have flat power spectrum. (arXiv:1502.05897)