THE FERMI-EDGE SINGULARITY AND BOUNDARY-CONDITION CHANGING OPERATORS

被引：123
|
作者：
AFFLECK, I
LUDWIG, AWW
机构：
[1] PRINCETON UNIV,JOSEPH HENRY LABS,PRINCETON,NJ 08544
[2] UNIV BRITISH COLUMBIA,DEPT PHYS,VANCOUVER V6T 1Z1,BC,CANADA
来源：
JOURNAL OF PHYSICS A-MATHEMATICAL AND GENERAL | 1994年 / 27卷 / 16期
关键词：
D O I：
10.1088/0305-4470/27/16/007
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
The boundary conformal field theory approach to quantum impurity problems is used to study the Fermi edge singularity, occurring in the x-ray adsorption probability. The deep-hole creation operator, in the effective low-energy theory, changes the boundary condition on the conduction electrons. By a conformal mapping, the dimension of such an operator is related to the ground-state energy for a finite system with different boundary conditions at the two ends. The Fermi edge singularity is solved, using this method, for the Luttinger liquid including backscattering and for the multi-channel Kondo problem.
引用
收藏
页码：5375 / 5392
页数：18
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