Quantum cosmology from the de Broglie-Bohm perspective

Understand

We review the main results that have been obtained in quantum cosmology from the perspective of the de Broglie-Bohm quantum theory.

• As it is a dynamical theory of assumed objectively real trajectories in the configuration space of the physical system under investigation, this quantum theory is not essentially probabilistic and dispenses the collapse postulate, turning it suitable to be applied to cosmology.
• In the framework of minisuperspace models, we show how quantum cosmological effects in the de-Broglie-Bohm's approach can avoid the initial singularity, and isotropize the Universe.
• We then extend minisuperspace in order to include linear cosmological perturbations.