Violation of the string hypothesis and Heisenberg XXZ spin chain
classification
✦ hep-th
cond-matmath-phmath.MP
keywords
numbersolutionsstringbethechaincompletenesscomplexconjecture
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In this paper we count the numbers of real and complex solutions to Bethe constraints in the two particle sector of the XXZ model. We find exact number of exceptions to the string conjecture and total number of solutions which is required for completeness.
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