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Primordial Non-Gaussianity
Marco Celoria, Sabino Matarrese
Here we review the present status of modelling of and searching for primordial non-Gaussianity of cosmological perturbations. After introducing the models for non-Gaussianity gener…
Hamiltonian analysis of mimetic scalar gravity revisited
Alexander Ganz, Purnendu Karmakar, Sabino Matarrese +1
We perform the Hamiltonian analysis of several mimetic gravity models and compare our results with those obtained previously by different authors. We verify that for healthy mimeti…
Formalism and Conserved Currents in Cosmology
Sabino Matarrese, Luigi Pilo, Rocco Rollo
The formalism, based on the counting of the number of e-folds during inflation in different local patches of the Universe, has been introduced several years ago as a simple an…
BAO reconstruction: a swift numerical action method for massive spectroscopic surveys
E. Sarpa, C. Schimd, E. Branchini +1
A new fully non-linear reconstruction algorithm for the accurate recovery of the Baryonic Acoustic Oscillations (BAO) scale in two-point correlation functions is proposed, based on…
Gravity in mimetic scalar-tensor theories after GW170817
Alexander Ganz, Nicola Bartolo, Purnendu Karmakar +1
We derive the most general mimetic scalar-tensor theory assuming a healthy "seed" action and accounting for the constraints on the speed of gravitational-wave propagation arising f…
Measuring the Energy Scale of Inflation with Large Scale Structures
Nicola Bellomo, Nicola Bartolo, Raul Jimenez +2
The determination of the inflationary energy scale represents one of the first step towards the understanding of the early Universe physics. The (very mild) non-Gaussian signals th…