Phys. Rev. Lett. 81, 5497–5500 (1998)Gravitational Waves from Collapsing Vacuum DomainsReceived 24 July 1998; published in the issue dated 21 December 1998 The breaking of an approximate discrete symmetry, the final stages of a first order phase transition, or a postinflationary 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 nonspherical 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. © 1998 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.81.5497
DOI:
10.1103/PhysRevLett.81.5497
PACS:
98.80.Cq, 04.30.Db, 98.70.Vc
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