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|Title:||Nonlinear quantum cosmology|
Nonlinear Wheeler-deWitt equation
|Source:||Nguyen, L.-H., Parwani, R.R. (2009-09). Nonlinear quantum cosmology. General Relativity and Gravitation 41 (11) : 2543-2560. ScholarBank@NUS Repository. https://doi.org/10.1007/s10714-009-0779-9|
|Abstract:||We study the effects of an information-theoretically motivated nonlinear correction to the Wheeler-deWitt equation in the minisuperspace scheme for flat, k = 0, Friedmann-Robertson-Walker universes. When the only matter is a cosmological constant, the nonlinearity can provide a barrier that screens the original Big Bang, leading to the quantum creation of a universe through tunneling just as in the k = 1 case. When the matter is instead a free massless scalar field, the nonlinearity can again prevent a contracting classical universe from reaching zero size by creating a bounce. Our studies here are self-consistent to leading order in perturbation theory for the nonlinear effects. © Springer Science+Business Media, LLC 2009.|
|Source Title:||General Relativity and Gravitation|
|Appears in Collections:||Staff Publications|
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