4 papers
Universal CMB Phase Coherence from Single-Field Inflation
Siméon Vareilles, Thomas Colas, Julien Grain +2
The phase coherence of primordial perturbations shapes the acoustic peaks of the CMB and is regarded as a key signature of inflation. Inflationary scenarios at different energy sca…
Closed-form linear moments of the two-dimensional angular central Gaussian distribution
Siméon Vareilles
The polar-angle marginal of a centred bivariate Gaussian distribution, obtained after integrating out the radial coordinate, gives the two-dimensional angular central Gaussian (ACG…
Time as a test-field: the no-boundary universe in motion and a smooth radiation bounce
Federico Piazza, Siméon Vareilles
The proper time of an observer can be introduced as a degree of freedom in quantum cosmology, additional to the existing fields. We review two arguments for using the Schrödinger e…
Cosmological perturbations meet Wheeler DeWitt
Federico Piazza, Siméon Vareilles
We study approximate solutions of the Wheeler DeWitt (WdW) equation and compare them with the standard results of cosmological perturbation theory. In mini-superspace, we introduce…