Physics – High Energy Physics – High Energy Physics - Lattice
Scientific paper
1996-08-15
Physics
High Energy Physics
High Energy Physics - Lattice
20 pages, plain LaTeX, macro mathsymb.sty included, figures included, also available as http://starsky.pcss.maps.susx.ac.uk/
Scientific paper
We derive various consistency requirements for Vachaspati-Vilenkin type Monte-Carlo simulations of cosmic string formation or disclination formation in liquid crystals. We argue for the use of a tetrakaidekahedral lattice in such simulations. We also show that these calculations can be carried out on lattices which are formally infinite, and do not necessitate the specification of any boundary conditions. This way string defects can be traced up to much larger lengths than on finite lattices. The simulations then fall into a more general class of simulations of self-interacting walks, which occupy the underlying lattice very sparsely. An efficient search algorithm is essential. We discuss various search strategies, and demonstrate how to implement hash tables with collision resolution by open addressing. The time to trace a string defect is then proportional only to the string length.
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