Inverse scattering approach for massive Thirring models with integrable type-II defects

We discuss the integrability of the Bosonic and Grassmannian massive Thirring models in the presence of defects through the inverse scattering approach. We present a general method to compute the generating functions of modified conserved quantities for any integrable field equation associated to the m x m spectral linear problem. We apply the method to derive in particular the defect contributions for the number of occupation, energy and momentum of the massive Thirring models.

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25 pages in IOP Latex style; some modifications to match version accepted by J Phys A; a section on Liouville integrability added

11.10.Kk
11.30.-j
11.10.Lm
02.30.Ik

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