Fock representations of the Lie superalgebra q(n+1)

Details Fock representations of the Lie superalgebra q(n+1) Fock representations of the Lie superalgebra q(n+1)

1999-11-23

arxiv.org/abs/math/9911176v2

Mathematics

Quantum Algebra

24 pages, LaTeX file, small corrections done; to appear in J. Phys. A: Math. Gen

Scientific paper

10.1088/0305-4470/33/13/306

For the Lie superalgebra $q(n+1)$ a description is given in terms of creation and annihilation operators, in such a way that the defining relations of $q(n+1)$ are determined by quadratic and triple supercommutation relations of these operators. Fock space representations $V_p$ of $q(n+1)$ are defined by means of these creation and annihilation operators. These new representations are introduced as quotient modules of some induced module of $q(n+1)$. The representations $V_p$ are not graded, but they possess a number of properties that are of importance for physical applications. For $p$ a positive integer, these representations $V_p$ are finite-dimensional, with a unique highest weight (of multiplicity 1). The Hermitian form that is consistent with the natural adjoint operation on $q(n+1)$ is shown to be positive definite on $V_p$. For $q(2)$ these representations are ``dispin''. For the general case of $q(n+1)$, many structural properties of $V_p$ are derived.

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