XXZ scalar products, Miwa variables and discrete KP

Details XXZ scalar products, Miwa variables and discrete KP XXZ scalar products, Miwa variables and discrete KP

2010-03-12

arxiv.org/abs/1003.2524v2

Physics

Mathematical Physics

20 pages, LaTeX-2e, using documentclass ws-procs9x6. A slightly improved version. Better exposition. To appear in Festschrift

Scientific paper

We revisit the quantum/classical integrable model correspondence in the
context of inhomogeneous finite length XXZ spin-1/2 chains with periodic
boundary conditions and show that the Bethe scalar product of an arbitrary
state and a Bethe eigenstate is a discrete KP tau-function. The continuous Miwa
variables of discrete KP are the rapidities of the arbitrary state.

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