The geometric dual of a-maximisation for toric Sasaki-Einstein manifolds

Journal article

We show that the Reeb vector, and hence in particular the volume, of a Sasaki-Einstein metric on the base of a toric Calabi-Yau cone of complex dimension n may be computed by minimising a function Z on ℝn which depends only on the toric data that defines the singularity. In this way one can extract certain geometric information for a toric Sasaki-Einstein manifold without finding the metric explicitly. For complex dimension n = 3 the Reeb vector and the volume correspond to the R-symmetry and the a central charge of the AdS/CFT dual superconformal field theory, respectively. We therefore interpret this extremal problem as the geometric dual of a-maximisation. We illustrate our results with some examples, including the Y p,q singularities and the complex cone over the second del Pezzo surface. © Springer-Verlag 2006.

Authors: Martelli, D; Sparks, J; Yau, S

• Publication status: Published
• Journal: COMMUNICATIONS IN MATHEMATICAL PHYSICS
• Volume: 268
• Issue: 1
• Pages: 39-65
• Publication date: 2006-11-01
• DOI: 10.1007/s00220-006-0087-0
• EISSN: 1432-0916
• ISSN: 0010-3616
• Language: English