Sommaire:

Using trajectories in quantum cosmology.
Cosmological perturbation theory aims at producing the primordial spectrum
by setting quantum vacuum initial conditions over a classically evolving background.
Although appearing potentially inconsistent, such an approach can be justified in
canonical quantum gravity for inflationary models by decohence. The situation may
not always be so clear-cut, but defining quantum perturbations in a computational
useful manner seems to require some way of defining a trajectory. Various proposals
are available, and I’ll describe two of them, namely the well-known de Broglie Bohm
eikonals and the coherent state approach with phase space formulation. I’ll introduce
both and discuss some consequences that can be more easily worked out.

Pour plus d'informations, merci de contacter Moultaka G.