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Exact Partition Function and Boundary State of Critical Ising Model with Boundary Magnetic Field

R. Chatterjee

hep-tharXiv:hep-th/9412169

Abstract

We compute the exact partition function of the 2D Ising Model at critical temperature but with nonzero magnetic field at the boundary. The model describes a renormalization group flow between the free and fixed conformal boundary conditions in the space of boundary interactions. For this flow the universal ground state degeneracy g and the full boundary state is computed exactly.

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