Boundary Condition Changing Operators in Conformal Field Theory and Condensed Matter Physics

Details Boundary Condition Changing Operators in Conformal Field Theory and Condensed Matter Physics Boundary Condition Changing Operators in Conformal Field Theory and Condensed Matter Physics

1996-11-09

arxiv.org/abs/hep-th/9611064v1

Nucl.Phys.Proc.Suppl.58:35-41,1997

Physics

High Energy Physics

High Energy Physics - Theory

7 pages, RevTex, epsf, for the proceedings of the conference, "Advanced Quantum Field Theory" (in memory of Claude Itzykson) L

Scientific paper

10.1016/S0920-5632(97)00411-8

Boundary condition changing operators in conformal field theory describe various types of "sudden switching" problems in condensed matter physics such as the X-ray edge singularity. We review this subject and give two extensions of previous work. A general derivation of a connection between the X-ray edge singularity, the Anderson orthogonality catastrophe and finite-size scaling of energies is given. The formalism is also extended to include boundstates.

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