Phys. Rev. D 75, 124003 (2007) [8 pages]Creatable universesReceived 29 January 2007; published 5 June 2007 We consider the question of properly defining energy and momenta for nonasymptotic Minkowskian spaces in general relativity. Only spaces of this type, whose energy, linear 3-momentum, and intrinsic angular momentum vanish, would be candidates for creatable universes, that is, for universes which could have arisen from a vacuum quantum fluctuation. Given a universe, we completely characterize the family of coordinate systems for which one could sensibly say that this universe is a creatable universe. © 2007 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevD.75.124003
DOI:
10.1103/PhysRevD.75.124003
PACS:
04.20.−q, 98.80.Jk
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