XXZ SCALAR PRODUCTS, MIWA VARIABLES AND DISCRETE KP

@article{Foda2010XXZSP,
  title={XXZ SCALAR PRODUCTS, MIWA VARIABLES AND DISCRETE KP},
  author={Omar Foda and Gus Schrader},
  journal={arXiv: Mathematical Physics},
  year={2010},
  pages={61-80}
}
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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