Universal Jump in the Helicity Modulus of the Two-Dimensional Quantum XY Model
Statistical Mechanics
2009-10-30 v2
Abstract
The helicity modulus of the S=1/2 XY model is precisely estimated through a world line quantum Monte Carlo method enhanced by a cluster update algorithm. The obtained estimates for various system sizes and temperatures are well fitted by a scaling form with L replaced by \log(L/L_0), which is inferred from the solution of the Kosterlitz renormalization group equation. The validity of the Kosterlitz-Thouless theory for this model is confirmed.
Cite
@article{arxiv.cond-mat/9702081,
title = {Universal Jump in the Helicity Modulus of the Two-Dimensional Quantum XY Model},
author = {Kenji Harada and Naoki Kawashima},
journal= {arXiv preprint arXiv:cond-mat/9702081},
year = {2009}
}
Comments
4 pages, 3 figures