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The momentum and the angular momentum of the Universe revisited. Some preliminary results

Ramon Lapiedra, Juan Antonio Morales and Joan Josep Ferrando

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We consider the question of properly defining energy and momenta for non asymptotic Minkowskian spaces in general relativity. Only those of these spaces which have zero energy, zero linear 3-momentum, and zero intrinsic angular momentum would be candidates to creatable universes, that is, to universes which could have arisen from a vacuum quantum fluctuation. Given a universe, we completely characterize the family of coordinate systems in which it would make sense saying that this universe can be a creatable universe.


PACS

98.80.Cq Particle-theory and field-theory models of the early Universe (including cosmic pancakes, cosmic strings, chaotic phenomena, inflationary universe, etc.)

04.20.-q Classical general relativity

95.30.Sf Relativity and gravitation

Subjects

Gravitation and cosmology

Astrophysics and astroparticles

Dates

Issue 1 (2007)



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