Dynamical evolution of domain walls in an expanding universe

Details Dynamical evolution of domain walls in an expanding universe Dynamical evolution of domain walls in an expanding universe

Dec 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989apj...347..590p&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 347, Dec. 15, 1989, p. 590-604. Research supported by NASA and Alfred P. Sl

Statistics

Computation

104

Broken Symmetry, Computational Astrophysics, Grand Unified Theory, Relic Radiation, Universe, Astronomical Models, Computerized Simulation, Domain Wall, Galactic Evolution, Numerical Integration, Random Walk, String Theory

Scientific paper

Whenever the potential of a scalar field has two or more separated, degenerate minima, domain walls form as the universe cools. The evolution of the resulting network of domain walls is calculated for the case of two potential minima in two and three dimensions, including wall annihilation, crossing, and reconnection effects. The nature of the evolution is found to be largely independent of the rate at which the universe expands. Wall annihilation and reconnection occur almost as fast as causality allows, so that the horizon volume is 'swept clean' and contains, at any time, only about one, fairly smooth, wall. Quantitative statistics are given. The total area of wall per volume decreases as the first power of time. The relative slowness of the decrease and the smoothness of the wall on the horizon scale make it impossible for walls to both generate large-scale structure and be consistent with quadrupole microwave background anisotropy limits.

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