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

Article

关键词: KOSTERLITZ-THOULESS TRANSITION;    MONTE-CARLO;    CRITICAL-BEHAVIOR;    PHASE-TRANSITION;    2 DIMENSIONS;    ALGORITHM;   

DOI  :  10.1103/PhysRevB.55.R11949

来源: SCIE

【 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.

【 授权许可】

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