Exact (d)->(+)&(-) boundary flow in the tricritical Ising model

Physics – High Energy Physics – High Energy Physics - Theory

Scientific paper

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14 pages, 2 figures

Scientific paper

10.1088/1742-5468/2004/03/P001

The integrable perturbation of the degenerate boundary condition (d) by the $\phi_{1,3}$ boundary field generates a renormalization group flow down to the superposition of Cardy boundary states (+)&(-). Exact Thermodynamic Bethe Ansatz (TBA) equations for all the excited states are derived here extending the results of a previous paper to this case. As an intermediate step, the non-Cardy boundary conformal sector (+)&(-) is also described as the scaling limit of an A_4 lattice model with appropriate integrable boundary conditions and produces the first example of superposition of finitized Virasoro characters.

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