Boundary energy of the general open XXZ chain at roots of unity

Abstract

We have recently proposed a Bethe Ansatz solution of the open spin-1/2 XXZ quantum spin chain with general integrable boundary terms (containing six free boundary parameters) at roots of unity. We use this solution, together with an appropriate string hypothesis, to compute the boundary energy of the chain in the thermodynamic limit.

22 pages, 6 figures; v2: some comments, a reference and a footnote added

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Cited by in corpus (2)

• Multiple reference states and complete spectrum of the $Z_n$ Belavin model with open boundaries
• Finite-size correction and bulk hole-excitations for special case of an open XXZ chain with nondiagonal boundary terms at roots of unity