Complete Bethe Ansatz solution of the open spin-s XXZ chain with general integrable boundary terms

Details Complete Bethe Ansatz solution of the open spin-s XXZ chain with general integrable boundary terms Complete Bethe Ansatz solution of the open spin-s XXZ chain with general integrable boundary terms

2007-07-04

arxiv.org/abs/0707.0653v2

J.Stat.Mech.0709:P09009,2007

Physics

Mathematical Physics

23 pages -- Latex2e; misprints in appendix corrected

Scientific paper

10.1088/1742-5468/2007/09/P09009

We consider the open spin-s XXZ quantum spin chain with N sites and general integrable boundary terms for generic values of the bulk anisotropy parameter, and for values of the boundary parameters which satisfy a certain constraint. We derive two sets of Bethe Ansatz equations, and find numerical evidence that together they give the complete set of $(2s+1)^{N}$ eigenvalues of the transfer matrix. For the case s=1, we explicitly determine the Hamiltonian, and find an expression for its eigenvalues in terms of Bethe roots.

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