Gauge-invariant bounce from loop quantum gravity

Understand

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.