Aswin K Balasubramanian et al 2007 Class. Quantum Grav. 24 6393 doi:10.1088/0264-9381/24/24/014
Aswin K Balasubramanian1,3, Suresh Govindarajan1 and Chethan N Gowdigere2
Show affiliationsWe pursue the symplectic description of toric Kähler manifolds. There exists a general local classification of metrics on toric Kähler manifolds equipped with Hamiltonian 2-forms due to Apostolov, Calderbank and Gauduchon (ACG). We derive the symplectic potential for these metrics. Using a method due to Abreu, we relate the symplectic potential to the canonical potential written by Guillemin. This enables us to recover the moment polytope associated with metrics and we thus obtain global information about the metric. We illustrate these general considerations by focusing on six-dimensional Ricci-flat metrics and obtain Ricci-flat metrics associated with real cones over Lpqr and Ypq manifolds. The metrics associated with cones over Ypq manifolds turn out to be partially resolved with two blow-up parameters taking special (non-zero) values. For a fixed Ypq manifold, we find explicit metrics for several inequivalent blow-ups parametrized by a natural number k in the range 0 < k < p. We also show that all known examples of resolved metrics such as the resolved conifold and the resolution of
also fit the ACG classification.
02.40.Sf Manifolds and cell complexes
04.50.-h Higher-dimensional gravity and other theories of gravity
32Q20 Kähler-Einstein manifolds (See also 53Cxx)
83C20 Classes of solutions; algebraically special solutions, metrics with symmetries
81T05 Axiomatic quantum field theory; operator algebras
83C05 Einstein's equations (general structure, canonical formalism, Cauchy problems)
Issue 24 (21 December 2007)
Received 1 September 2007, in final form 31 October 2007
Published 29 November 2007
Aswin K Balasubramanian et al 2007 Class. Quantum Grav. 24 6393
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