Physics – Condensed Matter – Disordered Systems and Neural Networks
Scientific paper
2009-01-29
J. Phys. A 42 (2009) 295001
Physics
Condensed Matter
Disordered Systems and Neural Networks
14 pages
Scientific paper
We study the square-lattice XY model in the presence of random phase shifts. We consider two different disorder distributions with zero average shift and investigate the low-temperature quasi-long-range order phase which occurs for sufficiently low disorder. By means of Monte Carlo simulations we determine several universal quantities which are then compared with the analytic predictions of the random spin-wave theory. We observe a very good agreement which indicates that the universal long-distance behavior in the whole low-disorder low-temperature phase is fully described by the random spin-wave theory.
Alba Vincenzo
Pelissetto Andrea
Vicari Ettore
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