Physics – Condensed Matter – Statistical Mechanics
Scientific paper
Mar 1991
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991sci...251.1336c&link_type=abstract
Science (ISSN 0036-8075), vol. 251, March 15, 1991, p. 1336-1342. SNSF-supported research.
Physics
Condensed Matter
Statistical Mechanics
236
Astronomical Models, Big Bang Cosmology, Broken Symmetry, Crystal Defects, Liquid Crystals, Scaling Laws, String Theory, Gauge Theory, Ising Model, Monopoles, Textures
Scientific paper
Liquid crystals are remarkably useful for laboratory exploration of the dynamics of cosmologically relevant defects. They are convenient to work with, they allow the direct study of the 'scaling solution' for a network of strings, and they provide a model for the evolution of monopoles and texture. Experiments described here support the simple 'one-scale' model for cosmic string evolution, as well as some qualitative predictions of string statistical mechanics. The structure of monopoles and their apparent cylindrical but not spherical symmetry is discussed. A particular kind of defect known as texture is described and is shown to have a dynamical instability - it can decay into a monopole-antimonopole pair. This decay process has been observed occurring in the liquid crystal, and studied with numerical simulations.
Chuang Isaac
Durrer Ruth
Turok Neil
Yurke Bernard
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