XXZ scalar products and KP

Details XXZ scalar products and KP XXZ scalar products and KP

2009-03-16

arxiv.org/abs/0903.2611v1

Nuclear Physics B 820 [FS] (2009) 649--663

Physics

Mathematical Physics

14 pages, LaTeX2E

Scientific paper

10.1016/j.nuclphysb.2009.04.019

Using a Jacobi-Trudi-type identity, we show that the scalar product of a general state and a Bethe eigenstate in a finite-length XXZ spin-1/2 chain is (a restriction of) a KP tau function. This leads to a correspondence between the eigenstates and points on Sato's Grassmannian. Each of these points is a function of the rapidities of the corresponding eigenstate, the inhomogeneity variables of the spin chain and the crossing parameter.

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