中文摘要：

通过无限矩阵乘积态算法计算了3态Potts模型在横向磁场中的基态普适序参量，发现参数在跨过临界点前后的单个格点普适序参量的行为不同，体现了自发对称性破缺并以此确定系统发生量子相变的临界点．具体计算过程中利用对赝相变点外推，得到本模型系统的临界值λc=0．9991，与解析结论精确值1非常一致．结果表明：一维量子系统在自发对称破缺情形下普适序参量是存在的．

英文摘要：

The ground - state universal construction of order parameters per lattice is computed for the quantum three - state Potts model in a transverse magnetic field in one spatial in terms of the iMPS algorithm. It is found that the behaviors of universal construction of order parameters are different when the control parameter crosses the criti- cal point. This implies that the systems undergo spontaneous symmetry breaking, and we can locate the phase tran- sition point. The critical point A c is determined from an extrapolation of the pseudo phase transition point λx with re- spect to the truncation dimension, so we can get λc= 0. 9991, which is close to the exact critical point I. The practical importance of universal construction of order parameters lies in computing and studying quantum phase transition.