cea-01223900
https://cea.hal.science/cea-01223900
https://cea.hal.science/cea-01223900/document
https://cea.hal.science/cea-01223900/file/Crem15.pdf
arxiv:1309.3557
doi:10.1088/1475-7516/2013/12/025
[CEA] CEA - Commissariat à l'énergie atomique
[CNRS] CNRS - Centre national de la recherche scientifique
[OPENAIRE] OpenAIRE
[DSM-IPHT] IPHT
[CEA-DRF] Direction de Recherche Fondamentale
[ANR] ANR
[GS-MATHEMATIQUES] Graduate School Mathématiques
[GS-PHYSIQUE] Graduate School Physique
Single-field consistency relations of large scale structure
Creminelli, Paolo
Noreña, Jorge
Simonović, Marko
Vernizzi, Filippo
[PHYS.GRQC] Physics [physics]/General Relativity and Quantum Cosmology [gr-qc]
[PHYS.HTHE] Physics [physics]/High Energy Physics - Theory [hep-th]
ART
cosmological perturbation theory
cosmological parameters from LSS
inflation
non-gaussianity
We derive consistency relations for the late universe (CDM and ΛCDM): relations between an n-point function of the density contrast $\delta$ and an ($n$ + 1)-point function in the limit in which one of the ($n$ + 1) momenta becomes much smaller than the others. These are based on the observation that a long mode, in single-field models of inflation, reduces to a diffeomorphism since its freezing during inflation all the way until the late universe, even when the long mode is inside the horizon (but out of the sound horizon). These results are derived in Newtonian gauge, at first and second order in the small momentum q of the long mode and they are valid non-perturbatively in the short-scale δ. In the non-relativistic limit our results match with. These relations are a consequence of diffeomorphism invariance; they are not satisfied in the presence of extra degrees of freedom during inflation or violation of the Equivalence Principle (extra forces) in the late universe
2013-12-11
2023-04-06
en
Journal of Cosmology and Astroparticle Physics
Institute of Physics (IOP)