Loop quantum cosmology and singularities

Understand

Loop quantum gravity is believed to eliminate singularities such as the big bang and big crunch singularity.

• This belief is based on studies of so-called loop quantum cosmology which concerns symmetry-reduced models of quantum gravity.
• In this paper, the problem of singularities is analysed in the context of the Bohmian formulation of loop quantum cosmology.
• In this formulation there is an actual metric in addition to the wave function, which evolves stochastically (rather than deterministically as the case of the particle evolution in non-relativistic Bohmian mechanics).