Physics – High Energy Physics – High Energy Physics - Theory
Scientific paper
1992-09-22
Phys.Lett.B298:318-328,1993
Physics
High Energy Physics
High Energy Physics - Theory
14 pages, LATEX, Preprint KUL-TF-92-33
Scientific paper
10.1016/0370-2693(93)91827-A
By generalizing the Miura transformation for $\Ww_N$ to other classical $\Ww$ algebras obtained by hamiltonian reduction, we find realisations of these algebras in terms of relatively simple non-abelian current algebras, e.g. $\widehat{sl(2)}\times \widehat{u(1)}^N$, generalizing the free field realisation of $\Ww_N$. As an example, we present the $\widehat{sl(2)}\times \widehat{u(1)}$ realisation of $\Ww_3^2$, which we also quantize. By a specific example, we also show how the realisation of $\Ww_N$ with the currents of $\Ww_{N-1}$ and a free boson can be generalized to certain classes of ``extended'' $\Ww_N$ algebras.
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