Quantum algebra of $N$ superspace

Details Quantum algebra of $N$ superspace Quantum algebra of $N$ superspace

2006-04-03

arxiv.org/abs/hep-th/0604009v3

Phys.Rev.D76:046005,2007

Physics

High Energy Physics

High Energy Physics - Theory

13 pages, Case with central charges included

Scientific paper

10.1103/PhysRevD.76.046005

We identify the quantum algebra of position and momentum operators for a quantum system bearing an irreducible representation of the super Poincare algebra in the N>1 and D=4 superspace both in the case where there are not central charges in the algebra and when they are present. This algebra is noncommutative for the position operators. We use the properties of superprojectors acting on the superfields to construct explicit position and momentum operators satisfying the algebra. They act on the projected wave functions associated to the various supermultiplets with defined superspin present in the representation. We show that the quantum algebra associated to the massive superparticle appears in our construction and is described by a supermultiplet of superspin 0. This result generalizes the construction for D=4, N=1 reported recently. For the case N=2 with central charges we present the equivalent results when the central charge and the mass are different. For the kappa-symmetric case when these quantities are equal we discuss the reduction to the physical degrees of freedom of the corresponding superparticle and the construction of the associated quantum algebra.

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