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Abstract: 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, wouldbe candidates for creatable universes, that is, for universes which could havearisen from a vacuum quantum fluctuation. Given a universe, we completelycharacterize the family of coordinate systems for which one could sensibly saythat this universe is a creatable universe.

Author: Joan Josep Ferrando, Ramon Lapiedra, Juan Antonio Morales


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