Unconventional Cosmology
arXiv:1203.6698 · doi:10.1007/978-3-642-33036-0_12
Abstract
I review two cosmological paradigms which are alternative to the current inflationary scenario. The first alternative is the "matter bounce", a non-singular bouncing cosmology with a matter-dominated phase of contraction. The second is an "emergent" scenario, which can be implemented in the context of "string gas cosmology". I will compare these scenarios with the inflationary one and demonstrate that all three lead to an approximately scale-invariant spectrum of cosmological perturbations.
45 pages, 10 figures; invited lectures at the 6th Aegean Summer School "Quantum Gravity and Quantum Cosmology", Chora, Naxos, Greece, Sept. 12 - 17 2012, to be publ. in the proceedings; these lecture notes form an updated version of arXiv:1003.1745 and arXiv:1103.2271
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Cited by in corpus (20)
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- Stable analytic bounce in non-local Einstein-Gauss-Bonnet cosmology
- Cosmological Perturbations in Unimodular Gravity
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- Breaking of Spatial Diffeomorphism Invariance, Inflation and the Spectrum of Cosmological Perturbations
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- Emergent Universe in f(Q) gravity theories
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- Dynamics of Cosmological Perturbations and Reheating in the Anamorphic Universe
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- Dark Energy from Topology
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