On the parafermionic scattering of an integrable Heisenberg model with impurity

Abstract

We have studied the massive parafermionic sector of an integrable spin-$s$ chain with an impurity of spin-$s^{{}^{\prime }}$ 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 $s^{{}^{\prime }}=1/2$, its interpretation in terms of conformally invariant boundary conditions is presented.

14 pages, UFSCARF-TH-94-4

References in corpus (2)

• Kinks in the Kondo problem
• Integrable versus Non-Integrable Spin Chain Impurity Models

Cited by in corpus (3)

• On O(1) contributions to the free energy in Bethe Ansatz systems: the exact g-function
• From integrability to conductance, impurity systems
• Exact finite-size spectrum for the multi-channel Kondo model and Kac-Moody fusion rules