含临界－非临界面的量子Ising链与共形不变性

The Quantum Ising Chain with Critical-off-Critical Interfaces and Conformal Invariance

利用传统的Ｆｅｒｍｉｏｎ技术，对角化了含多个临界－非临界面的量子Ｉｓｉｎｇ链．在热力学极限下，单个Ｆｅｒｍｉｏｎ能量与宇称算符的奇偶性无关，并证明了当临界参量构成可公度组态时，能谱具有塔状结构，因而在此情况下共形不变性被保持．

The quantum Ising chain wiht the critical-off critical interfaces is diagonalized by using the conventional fermion technique.In the thermodynamics limit,the one-fermion energies are independent of even and odd of the parity operator.The energy spectum is shown to have a tower structure if the critical parameters form a commensurate configuration.This means that conformal invariance is preserved in such cases.