The Fermi Edge Singularity and Boundary Condition Changing Operators
凝聚态物理
2009-10-22 v1 高能物理 - 理论
摘要
The boundary conformal field theory approach to quantum impurity problems is used to study the Fermi edge singularity, occuring in the X-ray adsorption probablility. 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 groundstate 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 back-scattering and for the multi-channel Kondo problem.
引用
@article{arxiv.cond-mat/9405057,
title = {The Fermi Edge Singularity and Boundary Condition Changing Operators},
author = {Ian Affleck and Andreas W. W. Ludwig},
journal= {arXiv preprint arXiv:cond-mat/9405057},
year = {2009}
}
备注
21 pages of RevTex plus one unencoded postscript figure, UBCT-94-003