Gauge-invariant bounce from loop quantum gravity

被引:14
作者
Liegener, Klaus [1 ]
Singh, Parampreet [1 ]
机构
[1] Louisiana State Univ, Dept Phys & Astron, Baton Rouge, LA 70803 USA
关键词
loop quantum cosmology; loop quantum gravity; singularity resolution; big bounce;
D O I
10.1088/1361-6382/ab7962
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
We present a gauge-invariant treatment of singularity resolution using loop quantum gravity techniques with respect to local SU(2) transformations. Our analysis reveals many novel features of quantum geometry which were till now hidden in models based on non-gauge-invariant discretizations. Quantum geometric effects resolve the big bang singularity replacing it with a non-singular bounce when spacetime curvature reaches Planckian value. The bounce is found to be generically asymmetric in the sense that pre-bounce and post-bounce branches are not mirrored to each other and effective constants, such as Newton's constant, are rescaled across the bounce. Furthermore, in the vicinity of the bounce, minimally coupled matter behaves as non-minimally coupled. These ramifications of quantum geometry open a rich avenue for potential phenomenological signatures.
引用
收藏
页数:9
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