arXiv subjects

Carlo Baccigalupi

Publications and source records attributed to Carlo Baccigalupi.

146 records · Page 9Linked to original sources

arXiv1996

Reconstruction of the bubble nucleating potential

We calculate analytically the bubble nucleation rate in a model of first order inflation which is able to produce large scale structure. The computation includes the first-order departure from the thin-wall limit, the explicit derivation of the pre-exponential factor, and the gravitational correction. The resulting bubble spectrum is then compared with constraints from the large scale structure and the microwave background. We show that there are models which pass all the constraints and produce bubble-like perturbations of interesting size. Furthermore, we show that it is in principle possible to reconstruct completely the inflationary two-field potential from observations.

astro-ph↗

arXiv1995

Reconciling Inflation with Openness

It is already understood that the increasing observational evidence for an open Universe may be reconciled with inflation if our horizon is contained inside one single huge bubble nucleated during the inflationary phase transition. In the scenario we present here, the Universe consists of infinitely many superhorizon bubbles, like our own, the distribution of which can be made to peak at $Ω_0\approx 0.2$. Therefore, unlike the existing literature, we do not have to rely upon the anthropic principle nor upon special initial conditions.

astro-ph↗