Hermitian Geometry and Complex Space-Time

Details Hermitian Geometry and Complex Space-Time Hermitian Geometry and Complex Space-Time

2005-03-05

arxiv.org/abs/hep-th/0503048v2

Commun.Math.Phys. 264 (2006) 291-302

Physics

High Energy Physics

High Energy Physics - Theory

17 pages, section four added. Version to appear in Communications in Mathematical Physics

Scientific paper

10.1007/s00220-005-1466-7

We consider a complex Hermitian manifold of complex dimensions four with a Hermitian metric and a Chern connection. It is shown that the action that determines the dynamics of the metric is unique, provided that the linearized Einstein action coupled to an antisymmetric tensor is obtained, in the limit when the imaginary coordinates vanish. The unique action is of the Chern-Simons type when expressed in terms of the K\"{a}hler form. The antisymmetric tensor field has gauge transformations coming from diffeomorphism invariance in the complex directions. The equations of motion must be supplemented by boundary conditions imposed on the Hermitian metric to give, in the limit of vanishing imaginary coordinates, the low-energy effective action for a curved metric coupled to an antisymmetric tensor.

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