Universal jump in the helicity modulus of the two-dimensional quantum XY model

被引：71

作者：

Harada, K ^{[1
]}

Kawashima, N ^{[1
]}

机构：

[1] TOHO UNIV,DEPT PHYS,FUNABASHI,CHIBA 274,JAPAN

来源：

PHYSICAL REVIEW B | 1997年 / 55卷 / 18期

关键词：

D O I：

10.1103/PhysRevB.55.R11949

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

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.

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页码：11949 / 11952

页数：4

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