Observing Correlated Production of Defects-Antidefects in Liquid Crystals
arXiv:hep-ph/9805502 · doi:10.1103/PhysRevLett.83.5030
Abstract
We present observations of strength one defects and antidefects formed in isotropic-nematic phase transition in a thin layer of nematic liquid crystals, using a cross-polarizer setup. We measure the widths of the distributions of {\it net} winding number in small regions, and determine the exponent characterizing the correlation between defects and antidefects to be 0.260.11, in very good agreement with the value 1/4 predicted by the Kibble mechanism for defect production. We also describe a novel technique to determine the director distribution in observations of defect networks.
RevTex file, 7 pages + 4 figures, significantly revised version involving new data and new analysis. Exponent characterizing defect-antidefect correlations determined
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