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  Null-Killing vector dimensional reduction and Galilean geometrodynamics

Julia, B., & Nicolai, H. (1995). Null-Killing vector dimensional reduction and Galilean geometrodynamics. Nuclear Physics B, 439(1-2), 291-326. doi:10.1016/0550-3213(94)00584-2.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-0013-5BA5-F Version Permalink: http://hdl.handle.net/11858/00-001M-0000-0013-5BA6-D
Genre: Journal Article

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342062.pdf (Publisher version), 2MB
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 Creators:
Julia, Bernard1, Author
Nicolai, Hermann2, Author              
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1External Organizations, escidoc:persistent13              
2Quantum Gravity & Unified Theories, AEI-Golm, MPI for Gravitational Physics, Max Planck Society, escidoc:24014              

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 Abstract: The solutions of Einstein's equations admitting one non-null Killing vector field are best studied with the projection formalism of Geroch. When the Killing vector is lightlike, the projection onto the orbit space still exists and one expects a covariant theory with degenerate contravariant metric to appear, its geometry is presented here. Despite the complications of indecomposable representations of the local Euclidean subgroup, one obtains an absolute time and a canonical, Galilean and so-called Newtonian, torsionless connection. The quasi-Maxwell field (Kaluza Klein one-form) that appears in the dimensional reduction is a non-separable part of this affine connection, in contrast to the reduction with a non-null Killing vector. One may define the Kaluza Klein scalar (dilaton) together with the absolute time coordinate after having imposed one of the equations of motion in order to prevent the emergence of torsion. We present a detailed analysis of the dimensional reduction using moving frames, we derive the complete equations of motion and propose an action whose variation gives rise to all but one of them. Hidden symmetries are shown to act on the space of solutions.

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 Dates: 1995-04
 Publication Status: Published in print
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 Identifiers: eDoc: 342062
DOI: 10.1016/0550-3213(94)00584-2
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Title: Nuclear Physics B
Source Genre: Journal
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Pages: - Volume / Issue: 439 (1-2) Sequence Number: - Start / End Page: 291 - 326 Identifier: ISSN: 0550-3213