Hyper-Kahler Calabi metrics, L**2 harmonic forms, resolved M2-branes, and AdS(4) / CFT(3) correspondence
Feb, 2001
56 pages
Published in:
- Nucl.Phys.B 617 (2001) 151-197
e-Print:
- hep-th/0102185 [hep-th]
Report number:
- DAMTP-2001-19,
- CTP-TAMU-07-01,
- UPR-928-T,
- IHP-2000-22,
- MCTP-01-10
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Abstract:
We obtain a simple explicit expression for the hyper-Kahler Calabi metric on the co-tangent bundle of CP^{n+1}, for all n, in which it is constructed as a metric of cohomogeneity one with SU(n+2)/U(n) principal orbits. These results enable us to obtain explicit expressions for an L^2-normalisable harmonic 4-form in D=8, and an L^2-normalisable harmonic 6-form in D=12. We use the former in order to obtain an explicit resolved M2-brane solution, and we show that this solution is invariant under all three of the supersymmetries associated with the covariantly-constant spinors in the 8-dimensional Calabi metric. We give some discussion of the corresponding dual N=3 three-dimensional field theory. Various other topics are also addressed, including superpotentials for the Calabi metrics and the metrics of exceptional G_2 and Spin(7) holonomy in D=7 and D=8. We also present complex and quaternionic conifold constructions, associated with the cone metrics whose resolutions are provided by the Stenzel T^*S^{n+1} and Calabi T^*\CP^{n+1} metrics. In the latter case we relate the construction to the hyper-Kahler quotient. We then use the hyper-K\"ahler quotient to give a quaternionic rederivation of the Calabi metrics.Note:
- 56 pages, Latex 3 times
- space: CP(N-1)
- space: Calabi-Yau
- differential forms: harmonic
- membrane model
- field theory: anti-de Sitter
- field theory: conformal
- superpotential
- conifold
- quaternion
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