外场中含缺陷量子Ising链的严格解  

THE EXACT SOLUTION OF ISING QUANTUM CHAIN WITH DEFECTS IN EXTERNAL FIELD

作　　者：李云[1] 张德刚[1] 

机构地区：[1]四川师范大学

出　　处：《四川师范大学学报（自然科学版）》1994年第5期64-67,共4页Journal of Sichuan Normal University（Natural Science）

摘　　要：本文利用Ｌｉｅｂ、Ｓｃｈｕｌｔｚ和Ｍａｔｔｉｓ发展的费米子方法严格求解含连续缺陷量子Ｉｓｉｎｇ链的低能激谱，当相互作用系数ｆ（ｘ）满足一定条件时，系统能谱具有等间距塔状结构，这表明该类系统仍保持共形不变性。The energy spectrum of the Ising Quantum chaining with continuous defects is solved exactly by using fermion technique. The excitation spectrum obtained in the continuous limit have a tower structure when interaction coefficient f(x) is the solution to the differential equation. This means that conformal invariance is preserved in these systems.

关 键 词：费米子方法 量子伊辛模型 缺陷 严格解 

分 类 号：O482.5[理学—固体物理]