7 papers
On the gauge invariant boundary condition in open XXZ chains: SoV bases, elementary blocks and overlaps
G. Niccoli, V. Terras
We consider the open XXZ spin chain with unparallel boundary fields, in the special case in which the Vertex-IRF transform of the K-matrix labelling the boundary field at site 1 is…
All correlation functions of the open XXX spin 1/2 quantum chains for unparallel boundary magnetic fields with one constraint
G. Niccoli
In this first paper, we start the analysis of correlation functions of quantum spin chains with general integrable boundary conditions. We initiate these computations for the open…
Non-diagonal open spin-1/2 XXZ quantum chains by separation of variables: Complete spectrum and matrix elements of some quasi-local operators
G. Niccoli
The integrable quantum models, associated to the transfer matrices of the 6-vertex reflection algebra for spin 1/2 representations, are studied in this paper. In the framework of S…
On correlation functions for the open XXZ chain with non-longitudinal boundary fields : the case with a constraint
G. Niccoli, V. Terras
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…
Correlation functions for open XXZ spin 1/2 quantum chains with unparallel boundary magnetic fields
G. Niccoli, V. Terras
In this paper we continue our derivation of the correlation functions of open quantum spin 1/2 chains with unparallel magnetic fields on the edges; this time for the more involved…
The open XYZ spin 1/2 chain: Separation of Variables and scalar products for boundary fields related by a constraint
G. Niccoli, V. Terras
We consider the open XYZ spin chain with boundary fields. We solve the model by the new Separation of Variables approach introduced in arXiv:1904.00852. In this framework, the tran…