Quantum Ising Criticality in Dimerized XY Spin—1／2Chain  

作　　者：YEFei 

机构地区：[1]DepartmentofPhysics,ShanghaiJiaoTongUniversity,Shanghai200030,China

出　　处：《Communications in Theoretical Physics》2003年第4期487-492,共6页理论物理通讯（英文版）

基　　金：国家自然科学基金，the RFDP

摘　　要：In the present paper we propose a spin-1/2 chain which provides an exactly solvable example to studythe Ising criticality with the central charge c = 1/2. We performthe diagonalization of this model in the presence ofmagnetic field. From the full energy spectrum, the central charge and the scaling dimensions are given at the criticalpoint. The results show evidently that the quantum Ising criticality exists in such a system.

关 键 词：quantized spin models Ising criticality 

分 类 号：O413[理学—理论物理]