Short-time dynamics and universality are investigated for the random-bond Potts model with a trinary distribu tion of quenched randomness on a two-dimensional triangular lattice. The universal power-law scaling behavi...Short-time dynamics and universality are investigated for the random-bond Potts model with a trinary distribu tion of quenched randomness on a two-dimensional triangular lattice. The universal power-law scaling behaviour is applied to estimate the exponents z and β/v. Emphasis is placed on dynamic Monte Carlo evolutions for different multi-disorder amplitudes. Our results indicate that the quenched impurities cause a change of the critical universality.展开更多
Using Tadpole-improved lattice action,the low-lying glueball spectrum of the pure-gauge SU(2)theory is calculated on an anisotropic lattice.The results of m(0+),m(2+),and m(0-)are consistent with that for the Wilson a...Using Tadpole-improved lattice action,the low-lying glueball spectrum of the pure-gauge SU(2)theory is calculated on an anisotropic lattice.The results of m(0+),m(2+),and m(0-)are consistent with that for the Wilson action on much larger lattices.This shows the advantage of using the coarse,anisotropic lattice to calculate the glueball masses.展开更多
To extend the cluster algorithm to SU(N)×SU(N)chiral models,a variant version of Wolff's cluster algorithm is proposed and tested for the 2-dimensional SU(3)×SU(3)chiral model.The results show that the n...To extend the cluster algorithm to SU(N)×SU(N)chiral models,a variant version of Wolff's cluster algorithm is proposed and tested for the 2-dimensional SU(3)×SU(3)chiral model.The results show that the new method can reduce the critical slowing down in SU(3)×SU(3)chiral model.展开更多
A scheme of loop-cluster algorithm is developed for simulating an anisotropic Heisenberg antiierromagnet-the XYZ model.Results of numerical simulations are presented,suggesting that this quantum system may also be stu...A scheme of loop-cluster algorithm is developed for simulating an anisotropic Heisenberg antiierromagnet-the XYZ model.Results of numerical simulations are presented,suggesting that this quantum system may also be studied by using the cluster updating techniques.展开更多
基金Supported by the National Natural Science Foundation of China under Grant Nos.19975041 and 19631050。
文摘Short-time dynamics and universality are investigated for the random-bond Potts model with a trinary distribu tion of quenched randomness on a two-dimensional triangular lattice. The universal power-law scaling behaviour is applied to estimate the exponents z and β/v. Emphasis is placed on dynamic Monte Carlo evolutions for different multi-disorder amplitudes. Our results indicate that the quenched impurities cause a change of the critical universality.
基金Supported in part by the National Natural Science Foundation of China under Grant Nos.19677205 and 19575039.
文摘Using Tadpole-improved lattice action,the low-lying glueball spectrum of the pure-gauge SU(2)theory is calculated on an anisotropic lattice.The results of m(0+),m(2+),and m(0-)are consistent with that for the Wilson action on much larger lattices.This shows the advantage of using the coarse,anisotropic lattice to calculate the glueball masses.
基金Supported by the National Natural Science Foundation of China。
文摘To extend the cluster algorithm to SU(N)×SU(N)chiral models,a variant version of Wolff's cluster algorithm is proposed and tested for the 2-dimensional SU(3)×SU(3)chiral model.The results show that the new method can reduce the critical slowing down in SU(3)×SU(3)chiral model.
基金Supported by the National Natural Science Foundation of Chinathe National Education Commission of China.
文摘A scheme of loop-cluster algorithm is developed for simulating an anisotropic Heisenberg antiierromagnet-the XYZ model.Results of numerical simulations are presented,suggesting that this quantum system may also be studied by using the cluster updating techniques.
