Emergent Universe
Cosmological models From Wikipedia, the free encyclopedia
An emergent Universe scenario is a cosmological model that features the Universe being in a low-entropy "dormant" state before the Big Bang or the beginning of the cosmic inflation. Several such scenarios have been proposed in the literature.
"Cosmic egg" scenarios
A popular version proposed by George Ellis and others involves the Universe shaped like a 3-dimensional sphere (or another compact manifold) until a rolling scalar field begins inflating it. These models are notable as potentially avoiding both a Big Bang singularity and a quantum gravity era.[1]
Criticism
This proposal has been criticised by Vilenkin and Mithani[2] and on different grounds by Aguirre and Kehayias[3] as inconsistent if quantum-mechanical effects are taken into account.
References
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