UNIVERSAL JUMP IN THE HELICITY MODULUS OF THE 2-DIMENSIONAL QUANTUM XY MODEL

Authors
HARADA K KAWASHIMA N
Citation
K. Harada et N. Kawashima, UNIVERSAL JUMP IN THE HELICITY MODULUS OF THE 2-DIMENSIONAL QUANTUM XY MODEL, Physical review. B, Condensed matter, 55(18), 1997, pp. 11949-11952
Citations number
23
Categorie Soggetti
Physics, Condensed Matter
Journal title
Physical review. B, Condensed matter → ACNP
ISSN journal
01631829
Volume
55
Issue
18
Year of publication
1997
Pages
11949 - 11952
Database
ISI
SICI code
0163-1829(1997)55:18<11949:UJITHM>2.0.ZU;2-A
Abstract
The helicity modulus of the S=1/2 XY model is precisely estimated thro ugh a world-line quantum Monte Carlo method enhanced by a cluster upda te algorithm. The obtained estimates for various system sizes and temp eratures are well fitted by a scaling form with L replaced by log(L/L- 0), which is inferred from the solution of the Kosterlitz renormalizat ion group equation. The validity of the Kosterlitz-Thouless theory for this model is confirmed.