The authors enumerate the 52 classes of SO(3)xT1-symmetric embeddings of static spherical metrics into (1,9)-dimensional flat space and assess unfolding and the existence of smooth Minkowski embeddings.
Geodetic Brane Gravity
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abstract
Within the framework of geodetic brane gravity, the Universe is described as a 4-dimensional extended object evolving geodetically in a higher dimensional flat background. In this paper, by introducing a new pair of canonical fields {lambda, P_{lambda}}, we derive the quadratic Hamiltonian for such a brane Universe; the inclusion of matter then resembles minimal coupling. Second class constraints enter the game, invoking the Dirac bracket formalism. The algebra of the first class constraints is calculated, and the BRST generator of the brane Universe turns out to be rank-1. At the quantum level, the road is open for canonical and/or functional integral quantization. The main advantages of geodetic brane gravity are: (i) It introduces an intrinsic, geometrically originated, 'dark matter' component, (ii) It offers, owing to the Lorentzian bulk time coordinate, a novel solution to the 'problem of time', and (iii) It enables calculation of meaningful probabilities within quantum cosmology without any auxiliary scalar field. Intriguingly, the general relativity limit is associated with lambda being a vanishing (degenerate) eigenvalue.
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gr-qc 1years
2024 1verdicts
CONDITIONAL 1representative citing papers
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Classification of ten-dimensional embeddings of spherically symmetric static metrics
The authors enumerate the 52 classes of SO(3)xT1-symmetric embeddings of static spherical metrics into (1,9)-dimensional flat space and assess unfolding and the existence of smooth Minkowski embeddings.