http://arxiv.org/abs/1803.01961
We introduce the “wedge diagram,” an intuitive way to illustrate how cosmological models with a classical (non-singular) bounce generically resolve fundamental problems in cosmology. These include the well-known horizon, flatness, and inhomogeneity problems; the small tensor-to-scalar ratio observed in the cosmic microwave background; the low entropy at the beginning of a hot, expanding phase; and the avoidance of quantum runaway. The same diagrammatic approach can be used to compare with other cosmological scenarios.
A. Ijjas and P. Steinhardt
Wed, 7 Mar 18
44/65
Comments: 19 pages, 5 figures
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