Critical Evaluation of Common Claims in Loop Quantum Cosmology
Critical Evaluation of Common Claims in Loop Quantum Cosmology
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DOI：
10.3390/universe6030036
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发表时间：
2020-02
期刊：
影响因子：
2.9
通讯作者：
M. Bojowald
中科院分区：
文献类型：
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作者：
M. Bojowald
在环量子宇宙学中已经分析了大量的模型，主要使用了超空间结构和微扰。同时，有效场论和协方差的一般物理原理常常被忽略。一致地引入这些成分需要对现有方案进行实质性修改。因此，主要由Ashtekar学派提出的更广泛的主张，如具有令人惊讶的半经典动力学的弹跳的一般性，量化模糊性的鲁棒性，协方差的实现，以及某些技术结果与潜在观察的相关性，都没有经过仔细审查。从这一评估中，我们可以得出一些有用的经验教训，以建立一个可持续的量子宇宙学版本。
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.