Galileon inflation

2010/09/13 by Clare Burrage, Claudia de Rham, David Seery +1 · 1 voice · 21 citations
Physics and Astronomy · #Black Holes and Theoretical Physics #Cosmology and Gravitation Theories #Galaxies: Formation, Evolution, Phenomena #astro-ph.CO #gr-qc #hep-th

paper · pdf · doi:10.1088/1475-7516/2011/01/014

published as JCAP 1101:014,2011 · 13 pages, plus appendices and references. v2: some clarifications in introduction; missing references added. v3: discussion of Sec. IV.B clarified. Matches version published in JCAP. v4: typos corrected in (44)-(47). v5: some improvements to IV.B; sign error fixed in h4 term of (B25) and related numerical error in (47)

openalex publication_date 2011/01/14 · arxiv created 2011/06/06 · arxiv updated 2011/06/08 · openalex created_date 2020/07/02 · openalex updated_date 2026/08/02

Abstract

Galileon inflation is a radiatively stable higher derivative model of inflation. The model is determined by a finite number of relevant operators which are protected by a covariant generalization of the Galileon shift symmetry. We show that the nongaussianity of the primordial density perturbation generated during an epoch of Galileon inflation is a particularly powerful observational probe of these models and that, when the speed of sound is small, fNL can be larger than the usual result fNL ~ 1/c_s².

Citations

• The shape of non-Gaussianities
• Non-Gaussian features of primordial fluctuations in single field inflationary models
• Causality, Analyticity and an IR Obstruction to UV Completion
• The galileon as a local modification of gravity
• k-Inflation
• Covariant Galileon

Cited by

• The Wave Function of the Universe and Inflation
• Inflation from a generalized exponential plateau: towards extra suppressed tensor-to-scalar ratios
• Aspects of Galileon Non-Renormalization
• Cosmological perturbations in massive gravity and the Higuchi bound
• Planck 2015 results. XX. Constraints on inflation
• Why does the effective field theory of inflation work?
• Disformal invariance of cosmological perturbations in a generalized class of Horndeski theories
• Inflation and cyclotron motion
• DBI Galileon and late time acceleration of the universe
• Oscillons in higher-derivative effective field theories
• Trispectrum estimation in various models of equilateral type non-Gaussianity
• Quantum corrections for the cubic Galileon in the covariant language
• Let Effective Field Theory of inflation flow: stochastic generation of models with red/blue tensor tilt
• Cosmological backgrounds of gravitational waves
• Realization of blue spectrum in generalized Galileon super-inflation models
• QCD axions and CMB anisotropy
• On the symmetries of cosmological perturbations
• Non-gaussian inflationary shapes inG3theories beyond Horndeski
• Constraining cosmological scaling solutions of a Galileon field
• Generalized SU(2) Proca theory
• Multi-disformal invariance of non-linear primordial perturbations

Discussions

• Here is a woefully incomplete and probably biased attempt to give a crash course on Galileons. I'll also just state up front my knowledge is a little out of date (my serious following of this story en [stackexchange, 7 points]

Related

• Weakly Broken Galileon Symmetry in Cosmology
• Generalized G-inflation: Inflation with the most general second-order field equations
• DBI Galileon inflation in the light of Planck 2015
• DBI Galileon inflation in background SUGRA
• Galileons in the Sky