W-Geometries

Details W-Geometries W-Geometries

1991-10-11

arxiv.org/abs/hep-th/9110028v1

Phys. Lett. B274 (1992) 309

Physics

High Energy Physics

High Energy Physics - Theory

(13 pages)

Scientific paper

10.1016/0370-2693(92)91990-Q

It is shown that, classically, the W-algebras are directly related to the extrinsic geometry of the embedding of two-dimensional manifolds with chiral parametrisation (W-surfaces) into higher dimensional K\"ahler manifolds. We study the local and the global geometries of such embeddings, and connect them to Toda equations. The additional variables of the related KP hierarchy are shown to yield a specific coordinate system of the target-manifold, and this allows us to prove that W-transformations are simply particular diffeomorphisms of this target space. The W-surfaces are shown to be instantons of the corresponding non-linear $\sigma$-models.

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