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Authors: Takashi Hiramatsu, Masahiro Kawasaki, Ken'ichi Saikawa

Date: 8 Feb 2010

Abstract: 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 10ˆ10-10ˆ12GeV will be observable in the next generation gravitational wave interferometers.

abs pdf