297 citations · 2.8k across the 57 of their papers we have counts for
6 papers · 1 filter
Testing loop quantum cosmology
Edward Wilson-Ewing
Loop quantum cosmology predicts that quantum gravity effects resolve the big-bang singularity and replace it by a cosmic bounce. Furthermore, loop quantum cosmology can also modify…
Bouncing cosmologies with dark matter and dark energy
Yi-Fu Cai, Antonino Marciano, Dong-Gang Wang +1
We review matter bounce scenarios where the matter content is dark matter and dark energy. These cosmologies predict a nearly scale-invariant power spectrum with a slightly red til…
Modified dispersion relations, inflation and scale invariance
Stefano Bianco, Victor Nicolai Friedhoff, Edward Wilson-Ewing
For a certain type of modified dispersion relations, the vacuum quantum state for very short wavelength cosmological perturbations is scale-invariant and it has been suggested that…
Converting entropy to curvature perturbations after a cosmic bounce
Angelika Fertig, Jean-Luc Lehners, Enno Mallwitz +1
We study two-field bouncing cosmologies in which primordial perturbations are created in either an ekpyrotic or a matter-dominated contraction phase. We use a non-singular ghost co…
Bouncing cosmologies from quantum gravity condensates
Daniele Oriti, Lorenzo Sindoni, Edward Wilson-Ewing
We show how the large-scale cosmological dynamics can be obtained from the hydrodynamics of isotropic group field theory condensate states in the Gross-Pitaevskii approximation. Th…
Emergent Friedmann dynamics with a quantum bounce from quantum gravity condensates
Daniele Oriti, Lorenzo Sindoni, Edward Wilson-Ewing
We study the effective cosmological dynamics, emerging as the hydrodynamics of simple condensate states, of a group field theory model for quantum gravity coupled to a massless sca…