6 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…
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…
On correlation functions of the open XYZ spin 1/2 chain with boundary fields related by a constraint
G. Niccoli, V. Terras
In this paper, we consider the quantum XYZ open spin-1/2 chain with boundary fields. We focus on the particular case in which the six boundary parameters are related by a single co…
Boundary overlap in the open XXZ spin chain
Charbel Abetian, Nikolai Kitanine, Veronique Terras
In this paper we compute the overlaps of the ground states for the open spin chains after a change of one of the boundary magnetic fields. It can be considered as the first step to…