The quantum realm of the "Little Sibling" of the Big Rip singularity

Understand

We analyse the quantum behaviour of the "Little Sibling" of the Big Rip singularity (LSBR) [1].

• The quantisation is carried within the geometrodynamical approach given by the Wheeler--DeWitt (WDW) equation.
• The classical model is based on a Friedmann--Lema\^{i}tre--Robertson--Walker Universe filled by a perfect fluid that can be mapped to a scalar field with phantom character.
• We analyse the WDW equation in two setups.