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math-ph2026
The quantum group structure of long-range integrable deformations
Koen Schouten, Marius de Leeuw
Quantum integrable spin chains are known to possess a large family of long-range deformations generated by the local, boost and bilocal operators. Although these deformations are w…
math-ph2024
All 4 x 4 solutions of the quantum Yang-Baxter equation
Marius de Leeuw, Vera Posch
In this paper, we complete the classification of 4 x 4 solutions of the Yang-Baxter equation. Regular solutions were recently classified and in this paper we find the remaining non…