Boundary Sine-Gordon Interactions at the Free Fermion Point

Abstract

We study bosonization of the sine-Gordon theory in the presence of boundary interactions at the free fermion point. In this way we obtain the boundary S-matrix as a function of physical parameters in the boundary sine-Gordon Lagrangian. The boundary S-matrix can be matched onto the solution of Ghoshal and Zamolodchikov, thereby relating the formal parameters in the latter solution to the physical parameters in the lagrangian.

10 pages, uses harvmac., minor changes in conventions more in accordance with existing literature

References in corpus (3)

• Boundary S-Matrix and Boundary State in Two-Dimensional Integrable Quantum Field Theory
• Exact Solution of a Boundary Conformal Field Theory
• Exact solution of a massless scalar field with a relevant boundary interaction

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