Correlation functions of the XXZ Heisenberg spin-1/2 chain in a magnetic field

Abstract

Using the algebraic Bethe ansatz method, and the solution of the quantum inverse scattering problem for local spins, we obtain multiple integral representations of the $n$-point correlation functions of the XXZ Heisenberg spin-$\frac{1}{2}$ chain in a constant magnetic field. For zero magnetic field, this result agrees, in both the massless and massive (anti-ferromagnetic) regimes, with the one obtained from the q-deformed KZ equations (massless regime) and the representation theory of the quantum affine algebra ${\mathcal{U}}_q({\widehat{sl}}_2)$ together with the corner transfer matrix approach (massive regime).

Latex2e, 26 pages

Cited by in corpus (224)

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• Entanglement entropy of two disjoint blocks in XY chains
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• Correlation functions of the open XXZ chain I
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• The 19-Vertex Model at critical regime $|q|=1$
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