Gravitational Waves from Collapsing Domain Walls

Details Gravitational Waves from Collapsing Domain Walls Gravitational Waves from Collapsing Domain Walls

2010-02-08

arxiv.org/abs/1002.1555v2

JCAP05(2010)032

Astronomy and Astrophysics

Astrophysics

Cosmology and Extragalactic Astrophysics

18 pages, 8 figures; revised version of the manuscript, accepted for publication in JCAP

Scientific paper

10.1088/1475-7516/2010/05/032

We study the production of gravitational waves from cosmic domain walls created during phase transition in the early universe. We investigate the process of formation and evolution of domain walls by running three dimensional lattice simulations. If we introduce an approximate discrete symmetry, walls become metastable and finally disappear. We calculate the spectrum of gravitational waves produced by collapsing metastable domain walls. Extrapolating the numerical results, we find the signal of gravitational waves produced by domain walls whose energy scale is around 10^10-10^12GeV will be observable in the next generation gravitational wave interferometers.

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