# On correlation functions for the open XXZ chain with non-longitudinal boundary fields : the case with a constraint

@inproceedings{Niccoli2022OnCF, title={On correlation functions for the open XXZ chain with non-longitudinal boundary fields : the case with a constraint}, author={Giuliano Niccoli and V{\'e}ronique Terras}, year={2022} }

This paper is a continuation of [1], in which a set of matrix elements of local operators was computed for the XXZ spin-1/2 open chain with a particular case of unparallel boundary ﬁelds. Here, we extend these results to the more general case in which both ﬁelds are non-longitudinal and related by one constraint, allowing for a partial description of the spectrum by usual Bethe equations. More precisely, the complete spectrum and eigenstates can be characterized within the Separation of…

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