Numerical Kaehler-Einstein metric on the third del Pezzo

Details Numerical Kaehler-Einstein metric on the third del Pezzo Numerical Kaehler-Einstein metric on the third del Pezzo

2007-03-07

arxiv.org/abs/hep-th/0703057v2

Commun.Math.Phys.282:357-393,2008

Physics

High Energy Physics

High Energy Physics - Theory

42 pages, 37 figures; v2 ref, preprint # added

Scientific paper

10.1007/s00220-008-0558-6

The third del Pezzo surface admits a unique Kaehler-Einstein metric, which is not known in closed form. The manifold's toric structure reduces the Einstein equation to a single Monge-Ampere equation in two real dimensions. We numerically solve this nonlinear PDE using three different algorithms, and describe the resulting metric. The first two algorithms involve simulation of Ricci flow, in complex and symplectic coordinates respectively. The third algorithm involves turning the PDE into an optimization problem on a certain space of metrics, which are symplectic analogues of the "algebraic" metrics used in numerical work on Calabi-Yau manifolds. Our algorithms should be applicable to general toric manifolds. Using our metric, we compute various geometric quantities of interest, including Laplacian eigenvalues and a harmonic (1,1)-form. The metric and (1,1)-form can be used to construct a Klebanov-Tseytlin-like supergravity solution.

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