An Exactly Solvable Constrained XXZ Chain
Abstract
A new family of exactly solvable models is introduced. These models are generalizations of the XXZ chain where the distance among spins up (σz-basis) cannot be smaller or equal to t (t=0,1,2,...). The case t=0 recovers the standard XXZ chain. The coordinate Bethe ansatz is applied and the phase diagram is calculated. Exploring the finite-size consequences of conformal invariance the critical exponents are evaluated exactly at the critical regions of the phase diagram
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