Asymptotic Flatness, Taub-NUT, and Variational Principle

Details Asymptotic Flatness, Taub-NUT, and Variational Principle Asymptotic Flatness, Taub-NUT, and Variational Principle

2011-06-22

arxiv.org/abs/1106.4372v2

Phys. Rev. D 84, 064034 (2011)

Physics

High Energy Physics

High Energy Physics - Theory

18 pages, no figures; v2 19 pages, minor changes, to appear in Phys Rev D

Scientific paper

10.1103/PhysRevD.84.064034

Using hyperbolic temporal and spatial cut-offs to define 4d asymptotically flat spacetimes, we show that supertranslation ambiguities in the asymptotic fields can all be removed even in the presence of gravitational magnetic charges. We then show that configurations with different electric and magnetic four-momenta can be consistently considered in the Mann-Marolf variational principle. This generalizes the previous result where variations over asymptotically flat configurations with fixed magnetic four-momenta were considered. We also express Kerr Taub-NUT metric to the leading and next to leading order in the Beig-Schmidt form, and compare the asymptotic form with the tensor harmonics on 3d de Sitter space.

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