Replica-deformation of the SU(2)-invariant Thirring model via solutions of the qKZ equation

Details Replica-deformation of the SU(2)-invariant Thirring model via solutions of the qKZ equation Replica-deformation of the SU(2)-invariant Thirring model via solutions of the qKZ equation

1999-07-17

arxiv.org/abs/hep-th/9907147v1

Nucl.Phys. B579 (2000) 535-560

Physics

High Energy Physics

High Energy Physics - Theory

30 pages, Latex, Dedicated to Moshe Flato

Scientific paper

10.1016/S0550-3213(00)00256-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.

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