A twistor sphere of generalized Kahler potentials on hyperkahler manifolds

Details A twistor sphere of generalized Kahler potentials on hyperkahler manifolds A twistor sphere of generalized Kahler potentials on hyperkahler manifolds

2011-11-16

arxiv.org/abs/1111.3893v2

Physics

High Energy Physics

High Energy Physics - Theory

17 pages. v2: Clarified references; improved appendix

Scientific paper

We consider the generalized Kahler structures (g,J_+,J_-) that arise on a hyperkahler manifold (M,g,I,J,K) when we choose J_+ and J_- from the twistor space of M. We find a relation between semichiral and arctic superfields which can be used to determine the generalized Kahler potential for hyperkahler manifolds whose description in projective superspace is fully understood. We use this relation to determine an S^2-family of generalized Kahler potentials for Euclidean space and for the Eguchi-Hanson geometry. Cotangent bundles of Hermitian symmetric spaces constitute a class of hyperkahler manifolds where our method can be applied immediately since the necessary results from projective superspace are already available. As a non-trivial higher-dimensional example, we determine the generalized potential for T*CP^n, which generalizes the Eguchi-Hanson result.

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