Physics – High Energy Physics – High Energy Physics - Theory
Scientific paper
2006-08-12
J.Phys.A40:7789-7802,2007
Physics
High Energy Physics
High Energy Physics - Theory
First resubmission: Some important changes performed. Title and Abstract are changed. New references added. LateX, no figures,
Scientific paper
10.1088/1751-8113/40/27/023
Whenever the group $\R^n$ acts on an algebra $\calA$, there is a method to twist $\cal A$ to a new algebra $\calA_\theta$ which depends on an antisymmetric matrix $\theta$ ($\theta^{\mu \nu}=-\theta^{\nu \mu}=\mathrm{constant}$). The Groenewold-Moyal plane $\calA_\theta(\R^{d+1})$ is an example of such a twisted algebra. We give a general construction to realise this twist in terms of $\calA$ itself and certain ``charge'' operators $Q_\mu$. For $\calA_\theta(\R^{d+1})$, $Q_\mu$ are translation generators. This construction is then applied to twist the oscillators realising the Kac-Moody (KM) algebra as well as the KM currents. They give different deformations of the KM algebra. From one of the deformations of the KM algebra, we construct, via the Sugawara construction, the Virasoro algebra. These deformations have implication for statistics as well.
Balachandran Aiyalam P.
Marques A. M.
Queiroz Amilcar R.
Teotonio-Sobrinho Paulo
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