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Title: Singularity avoidance in nonlinear quantum cosmology
Authors: Nguyen, L.-H.
Parwani, R.R. 
Keywords: Nonlinear wheeler-dewitt equation
Quantum cosmology
Singularity avoidance
Issue Date: 2009
Citation: Nguyen, L.-H.,Parwani, R.R. (2009). Singularity avoidance in nonlinear quantum cosmology. AIP Conference Proceedings 1115 : 180-185. ScholarBank@NUS Repository.
Abstract: We extend our previous study on the effects of an information-theoretically motivated nonlinear correction to the Wheeler-deWitt equation in the minisuperspace scheme for FRW universes. Firstly we show that even when the geometry is hyperbolic, and matter given by a cosmological constant, the nonUnearity can stiU provide a barrier to screen the initial singidarity, just as in the case for flat universes. Secondly, in the flat case we show that singularity avoidance in the presence of a free massless scalar field is perturbatively possible for a very large class of initially unperturbed quantum states, generalising our previous discussion using Gaussian states. © 2009 American Institute of Physics.
Source Title: AIP Conference Proceedings
ISBN: 9780735406520
ISSN: 0094243X
DOI: 10.1063/1.3131494
Appears in Collections:Staff Publications

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