Two-Point Functions and Logarithmic Boundary Operators in Boundary Logarithmic Conformal Field Theories

Amongst conformal field theories, there exist logarithmic conformal field theories such as $c_{p,1}$ models. We have investigated $c_{p,q}$ models with a boundary in search of logarithmic theories and have found logarithmic solutions of two-point functions in the context of the Coulomb gas picture. We have also found the relations between coefficients in the two-point functions and correlation functions of logarithmic boundary operators, and have confirmed the solutions in [hep-th/0003184]. Other two-point functions and boundary operators have also been studied in the free boson construction of boundary CFT with $SU(2{)}_k$ symmetry in regard to logarithmic theories. This paper is based on a part of D. Phil. Thesis [hep-th/0312160].