A note on EinsteinSasaki metrics in D 7
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abstract
In this paper, we obtain new non-singular Einstein-Sasaki spaces in dimensions D 7. The local construction involves taking a circle bundle over a (D - 1)-dimensional Einstein-Khler metric that is itself constructed as a complex line bundle over a product of Einstein-Khler spaces. In general, the resulting Einstein-Sasaki spaces are singular, but if parameters in the local solutions satisfy appropriate rationality conditions, the metrics extend smoothly onto complete and non-singular compact manifolds. The seven-dimensional space, whose base is a complex line bundle over S2 S2, is discussed in detail since it has relevance in terms of the AdS/CFT correspondence. 2005 IOP Publishing Ltd.