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.
All Science Journal Classification (ASJC) codes
- Physics and Astronomy (miscellaneous)
- bouncing cosmology
- ekyprotic universe
- flatness problem
- homogeneity problem
- singularity problem