Exact solution of the open XXZ chain with general integrable boundary terms at roots of unity

Details Exact solution of the open XXZ chain with general integrable boundary terms at roots of unity Exact solution of the open XXZ chain with general integrable boundary terms at roots of unity

2006-05-22

arxiv.org/abs/hep-th/0605223v1

J.Stat.Mech.0608:P08006,2006

Physics

High Energy Physics

High Energy Physics - Theory

22 pages

Scientific paper

10.1088/1742-5468/2006/08/P08006

We propose a Bethe-Ansatz-type solution of the open spin-1/2 integrable XXZ quantum spin chain with general integrable boundary terms and bulk anisotropy values i \pi/(p+1), where p is a positive integer. All six boundary parameters are arbitrary, and need not satisfy any constraint. The solution is in terms of generalized T - Q equations, having more than one Q function. We find numerical evidence that this solution gives the complete set of 2^N transfer matrix eigenvalues, where N is the number of spins.

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