一维准周期罗盘模型的量子相变

Quantum phase transition in one-dimensional quasiperiodic compass model

通过约旦-维格纳变换方法,研究了一维斐波那契链下罗盘模型的量子相变行为.根据计算结果分析,精确地确定了相变点的位置、能隙以及自旋关联函数,同时确认为第二级量子相变.

Using Jordan-Wigner transformation,we investigate the quantum phase transition of a one-dimensional Fibonacci compass chain.According to the numerical calculation,the critical point of system,the energy gap and the spin correlation functions are determined exactly.Meanwhile,the kind of the phase transition is identified as the second order.