Geometric discord approach to quantum phase transition in the anisotropy XY spin model

作者：Cheng W W^*; Shan C J; Sheng Y B; Gong L Y; Zhao S M; Zheng B Y

来源：Physica E: Low-Dimensional Systems and Nanostructures , 2012, 44(7-8): 1320-1323.

DOI：10.1016/j.physe.2012.02.011

We investigate the quantum critical behavior in the anisotropy XY spin chain by means of geometric discord (D-G). Near the critical point, the key ingredients of the quantum criticality (e.g, finite-size scaling behavior, universality principle and critical exponents) are investigated carefully, and the results show that the D-G is reliable to characterize the quantum critical behavior in such system.

• 出版日期2012-5
• 单位湖北师范大学; 南京大学