Droplet Excitations for the Spin-1/2 XXZ Chain with Kink Boundary Conditions
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We give a precise definition for excitations consisting of a droplet of size n in the XXZ chain with various choices of boundary conditions, including kink boundary conditions and prove that, for each n, the droplet energies converge to a boundary condition independent value in the thermodynamic limit. We rigorously compute an explicit formula for this limiting value using the Bethe ansatz.
36 pages, figures included as eps files
36 pages, figures included as eps files