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On integrable Hamiltonians for higher spin \(XXZ\) chain. (English) Zbl 1062.82011

Summary: Integrable Hamiltonians for higher spin periodic \(XXZ\) chains are constructed in terms of the spin generators; explicit examples for spins up to \(3 \over 2\) are given. Relations between Hamiltonians for some \(U_q(sl_2)\)-symmetric and \(U(1)\)-symmetric universal \(r\)-matrices are studied; their properties are investigated. A certain modification of the higher spin periodic chain Hamiltonian is shown to be an integrable \(U_q(sl_2)\)-symmetric Hamiltonian for an open chain.

MSC:

82B23 Exactly solvable models; Bethe ansatz
37N20 Dynamical systems in other branches of physics (quantum mechanics, general relativity, laser physics)
81R12 Groups and algebras in quantum theory and relations with integrable systems
81R50 Quantum groups and related algebraic methods applied to problems in quantum theory
82B20 Lattice systems (Ising, dimer, Potts, etc.) and systems on graphs arising in equilibrium statistical mechanics

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