On the quantum fate of singularities in a dark-energy dominated universe

Understand

Classical models for dark energy can exhibit a variety of singularities, many of which occur for scale factors much bigger than the Planck length.

• We address here the issue whether some of these singularities, the big freeze and the big demarrage, can be avoided in quantum cosmology.
• We use the framework of quantum geometrodynamics.
• We restrict our attention to a class of models whose matter content can be described by a generalized Chaplygin gas and be represented by a scalar field with an appropriate potential.