Critical Evaluation of Common Claims in Loop Quantum Cosmology

Universe

Martin Bojowald¹ 

[1] Institute for Gravitation and the Cosmos, the Pennsylvania State University, 104 Davey Lab, University Park, PA 16802, USA;

关键词: loop quantum cosmology;    quantum corrections;    effective field theory;    covariance;   

DOI  :  10.3390/universe6030036

来源: DOAJ

【 摘 要 】

A large number of models have been analyzed in loop quantum cosmology, using mainly minisuperspace constructions and perturbations. At the same time, general physics principles from effective field theory and covariance have often been ignored. A consistent introduction of these ingredients requires substantial modifications of existing scenarios. As a consequence, none of the broader claims made mainly by the Ashtekar school—such as the genericness of bounces with astonishingly semiclassical dynamics, robustness with respect to quantization ambiguities, the realization of covariance, and the relevance of certain technical results for potential observations—hold up to scrutiny. Several useful lessons for a sustainable version of quantum cosmology can be drawn from this evaluation.

【 授权许可】

Unknown