We consider true vacuum bubbles generated in a first order phase transition occurring during the slow rolling era of a two field inflation: it is known that gravitational waves are produced by the collision of such bubbles. We find that the epoch of the phase transition strongly affects the characteristic peak frequency of the gravitational waves, causing an observationally interesting redshift in addition to the post-inflationary expansion. In particular it is found that a phase transition occurring typically 10–20 e-foldings before the reheating at kT≃1015GeV may be detected by the next LIGO gravity waves interferometers. Moreover, for recently proposed models capable of generating the observed large scale voids as remnants of the primordial bubbles (for which the characteristic wave lengths are several tens of Mpc), it is found that the level of anisotropy of the cosmic microwave background provides a deep insight upon the physical parameters of the effective Lagrangian.

Stochastic gravitational background from inflationary phase transitions / Baccigalupi, C.; Amendola, L.; Fortini, P.; Occhionero, F.. - In: PHYSICAL REVIEW D. - ISSN 0556-2821. - 56:8(1997), pp. 1-8. [10.1103/PhysRevD.56.4610]

Stochastic gravitational background from inflationary phase transitions

Baccigalupi, C.;
1997-01-01

Abstract

We consider true vacuum bubbles generated in a first order phase transition occurring during the slow rolling era of a two field inflation: it is known that gravitational waves are produced by the collision of such bubbles. We find that the epoch of the phase transition strongly affects the characteristic peak frequency of the gravitational waves, causing an observationally interesting redshift in addition to the post-inflationary expansion. In particular it is found that a phase transition occurring typically 10–20 e-foldings before the reheating at kT≃1015GeV may be detected by the next LIGO gravity waves interferometers. Moreover, for recently proposed models capable of generating the observed large scale voids as remnants of the primordial bubbles (for which the characteristic wave lengths are several tens of Mpc), it is found that the level of anisotropy of the cosmic microwave background provides a deep insight upon the physical parameters of the effective Lagrangian.
1997
56
8
1
8
4610
https://arxiv.org/abs/gr-qc/9709044
Baccigalupi, C.; Amendola, L.; Fortini, P.; Occhionero, F.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/20.500.11767/11789
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