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.

中文翻译：

---

对回路量子宇宙学中的共同主张的批判性评价

在环量子宇宙学中已经分析了许多模型，主要使用微型超空间构造和微扰。同时，来自有效场论和协方差的一般物理学原理经常被忽略。不断引入这些成分需要对现有方案进行重大修改。因此，没有任何主要由Ashtekar学派提出的更广泛的主张，例如具有惊人的半经典动力学的弹跳的通用性，相对于量化歧义的鲁棒性，协方差的实现以及某些技术结果与潜在观测值的相关性-坚持审查。可以从该评估中得出一些有益的经验教训，以实现可持续发展的量子宇宙学。