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Author Coulson, D. ♦ Lalak, Z. ♦ Ovrut, B.
Source United States Department of Energy Office of Scientific and Technical Information
Content type Text
Language English
Subject Keyword PHYSICS ♦ PHASE TRANSFORMATIONS ♦ SYMMETRY BREAKING ♦ UNIVERSE ♦ VACUUM STATES ♦ ENERGY DENSITY ♦ ANISOTROPY ♦ BACKGROUND RADIATION ♦ MICROWAVE RADIATION ♦ COSMIC BACKGROUND RADIATION ♦ EARLY UNIVERSE ♦ DISCRETE SYMMETRY GROUPS ♦ DOMAIN WALLS ♦ INITIAL CONDITIONS
Abstract Domain walls form naturally in the early Universe whenever a discrete symmetry is spontaneously broken at some phase transition. When each vacuum is populated equally, it is well known that the domain wall network comes to dominate the energy density of the Universe and causes excessive anisotropy in the cosmic microwave background. We present results for the initial conditions and dynamical evolution of domain wall networks in which one of the degenerate vacua has a population bias over the other. The initial distribution of domain walls is well described by percolation theory. We find that such networks, although they show evidence of a limited scaling regime for a range of biases, do not persist indefinitely. It follows that biased domain wall networks avoid the energy density and anisotropy problems. {copyright} {ital 1996 The American Physical Society.}
ISSN 05562821
Educational Use Research
Learning Resource Type Article
Publisher Date 1996-04-01
Publisher Department University of Pennsylvania
Publisher Place United States
Journal Physical Review, D
Volume Number 53
Issue Number 8
Organization University of Pennsylvania


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