%0 Journal Article
%T Replica-deformation of the SU(2)-invariant Thirring model via solutions of the qKZ equation
%A Mathias Pillin
%J Mathematics
%D 1999
%I arXiv
%R 10.1016/S0550-3213(00)00256-X
%X The response of an integrable QFT under variation of the Unruh temperature has recently been shown to be computable from an S-matrix preserving (`replica') deformation of the form factor approach. We show that replica-deformed form factors of the SU(2)-invariant Thirring model can be found among the solutions of the rational $sl_2$-type quantum Knizhnik-Zamolodchikov equation at generic level. We show that modulo conserved charge solutions the deformed form factors are in one-to-one correspondence to the ones at level zero and use this to conjecture the deformed form factors of the Noether current in our model.
%U http://arxiv.org/abs/hep-th/9907147v1