Symplectic and orthogonal Lie algebra technology for bosonic and fermionic oscillator models of integrable systems

Details Symplectic and orthogonal Lie algebra technology for bosonic and fermionic oscillator models of integrable systems Symplectic and orthogonal Lie algebra technology for bosonic and fermionic oscillator models of integrable systems

2000-07-31

arxiv.org/abs/math-ph/0007040v1

Int.J.Mod.Phys.A16:1199-1225,2001

Physics

Mathematical Physics

24 pages, LaTeX

Scientific paper

10.1142/S0217751X01002890

To provide tools, especially L-operators, for use in studies of rational Yang-Baxter algebras and quantum integrable models when the Lie algebras so(N) (b_n, d_n) or sp(2n) (c_n) are the invariance algebras of their R matrices, this paper develops a presentation of these Lie algebras convenient for the context, and derives many properties of the matrices of their defining representations and of the ad-invariant tensors that enter their multiplication laws. Metaplectic-type representations of sp(2n) and so(N) on bosonic and on fermionic Fock spaces respectively are constructed. Concise general expressions (see (5.2) and (5.5) below) for their L-operators are obtained, and used to derive simple formulas for the T operators of the rational RTT algebra of the associated integral systems, thereby enabling their efficient treatment by means of the algebraic Bethe ansatz.

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