• Corpus ID: 239024635

Breaking the Single Clock Symmetry: measuring single-field inflation non-Gaussian features

  title={Breaking the Single Clock Symmetry: measuring single-field inflation non-Gaussian features},
  author={Daniele Bertacca and Raul Jimenez and S. Matarrese and Licia Verde},
Daniele Bertacca, 2, 3 Raul Jimenez, 5 Sabino Matarrese, 2, 3, 6 and Licia Verde 5 Dipartimento di Fisica e Astronomia Galileo Galilei, Università di Padova, 35131 Padova, Italy INFN, Sezione di Padova, via F Marzolo 8, I-35131 Padova, Italy. INAF Osservatorio Astronomico di Padova, vicolo dell Osservatorio 5, I-35122 Padova, Italy.∗ ICC, University of Barcelona, Marti i Franques 1, 08028 Barcelona, Spain. ICREA, Pg. Lluis Companys 23, Barcelona, E-08010, Spain. Gran Sasso Science Institute… 
1 Citations
The quantum de Sitter root of quasi de Sitter observables: a pedagogical review
In inflationary cosmology the quasi de Sitter graceful exit allows us to measure the quantum features of the primordial dS phase, in particular, the lack of scale invariance parametrized by the


The Three-Point Correlation Function of the Cosmic Microwave Background in Inflationary Models
We analyze the temperature three–point correlation function and the skewness of the Cosmic Microwave Background (CMB), providing general relations in terms of multipole coefficients. We then focus on
Cosmic microwave background bispectrum and slow-roll inflation
ABSTRA C T Recent tentative findings of non-Gaussian structure in the COBE-DMR data set have triggered renewed attention on candidate models from which such intrinsic signature could arise. In the
The Observed Squeezed Limit of Cosmological Three-Point Functions
of cosmological perturbation theory on these observables. This makes crucial use of Fermi Normal Coordinates and their conformal generalization, which we introduce here and discuss in detail. As an
Dominance of gauge artifact in the consistency relation for the primordial bispectrum
The conventional cosmological perturbation theory has been performed under the assumption that we know the whole spatial region of the universe with infinite volume. This is, however, not the case in
Cosmic microwave background bispectrum and inflation
We derive an expression for the non-Gaussian cosmic microwave background (CMB) statistic Il3 defined recently by Ferreira, Magueijo, and Gorski in terms of the slow-roll-inflation parameters e and η.
Scale-dependent halo bias and the squeezed limit bispectrum in the presence of radiation
We investigate the gravitational effect of large-scale radiation perturbations on small-scale structure formation. In addition to making the growth of matter perturbations scale dependent, the
Is There Scale-Dependent Bias in Single-Field Inflation?
Scale-dependent halo bias due to local primordial non-Gaussianity provides a strong test of single-field inflation. While it is universally understood that single-field inflation predicts negligible
Second-Order Cosmological Perturbations from Inflation
We present the first computation of the cosmological perturbations generated during inflation up to second order in deviations from the homogeneous background solution. Our results, which fully
Non-Gaussian features of primordial fluctuations in single field inflationary models
We compute the three point correlation functions for primordial scalar and tensor fluctuations in single field inflationary models. We obtain explicit expressions in the slow roll limit where the
How Gaussian can our Universe be
26 + 18 pages, 2 figures. References added and minor typos corrected. Matches published version