TL;DR
This paper develops Q-systems for open Heisenberg spin chains with boundary magnetic fields, providing a new formulation and verification method involving boundary parameters and Wronskian-type formulas.
Contribution
It introduces novel Q-systems for both isotropic and anisotropic open Heisenberg chains with boundary fields, verified through new Wronskian formulas.
Findings
Q-systems formulated for open Heisenberg chains with boundary fields
Verification via Wronskian-type formulas involving boundary parameters
Applicable to both isotropic and anisotropic cases
Abstract
Q-systems provide an efficient way of solving Bethe equations. We formulate here Q-systems for both the isotropic and anisotropic open Heisenberg quantum spin-1/2 chains with diagonal boundary magnetic fields. We check these Q-systems using novel Wronskian-type formulas (relating the fundamental Q-function and its dual) that involve the boundary parameters.
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