Kosterlitz-Thouless transition of quantum XY model in two dimensions

Дата и время публикации : 1998-03-09T08:46:17Z

Авторы публикации и институты :
Kenji Harada
Naoki Kawashima

Ссылка на журнал-издание: J. Phys. Soc. Jpn. 67 (1998) 2768
Коментарии к cтатье: 8 pages, 2 tables, 6 figures
Первичная категория: cond-mat.stat-mech

Все категории : cond-mat.stat-mech

Краткий обзор статьи: The two-dimensional $S=1/2$ XY model is investigated with an extensive quantum Monte Carlo simulation. The helicity modulus is precisely estimated through a continuous-time loop algorithm for systems up to $128 times 128$ near and below the critical temperature. The critical temperature is estimated as $T_{rm KT} = 0.3427(2)J$. The obtained estimates for the helicity modulus are well fitted by a scaling form derived from the Kosterlitz renormalization group equation. The validity of the Kosterlitz-Thouless theory for this model is confirmed.

Category: Physics