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On the parafermionic scattering of an integrable Heisenberg model with impurity

M. J. Martins
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Abstract

We have studied the massive parafermionic sector of an integrable spin-$s$ chain with an impurity of spin-$s^{'}$ in presence of a magnetic field. The effect of the impurity is encoded in a computable parafermionic impurity scattering amplitude and its contribution to the finite size properties of the free energy is discussed. As an example we compute the non-integer degeneracy of the ground state. For the simplest model of $s=1$ and $s^{'}=1/2$, its interpretation in terms of conformally invariant boundary conditions is presented.

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M. J. Martins. 1994-02-21. On the parafermionic scattering of an integrable Heisenberg model with impurity. https://doi.org/10.1016/0550-3213(94)90025-6

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