Gravitational Waves from Collapsing Vacuum Domains

Abstract

The breaking of an approximate discrete symmetry, the final stages of a first order phase transition, or a post-inflationary biased probability distribution for scalar fields are possible cosmological scenarios characterized by the presence of unstable domain wall networks. Combining analytical and numerical techniques, we show that the non-spherical collapse of these domains can be a powerful source of gravitational waves. We compute their contribution to the stochastic background of gravitational radiation and explore their observability by present and future gravitational wave detectors.

Revised version to appear in Physical Review Letters. Changes have been made which improve the presentation of the results. Figure 3 was modified, but conclusions remain the same

References in corpus (1)

• Stochastic gravitational background from inflationary phase transitions

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