2009/03/31 by Erandy Ramirez, Erandy Ramírez, Dominik J. Schwarz · 2 citations
Mathematics · Physics and Astronomy · #Algorithm #Black Holes and Theoretical Physics #Cosmology and Gravitation Theories #Counterexample #Discrete mathematics #Galaxies: Formation, Evolution, Phenomena #Inflation (cosmology) #Inflaton #Lambda #Mathematics #Physics #Quantum mechanics #Theoretical physics #astro-ph.CO #gr-qc #hep-ph #hep-th
paper · pdf · doi:10.1103/physrevd.80.023525
published as Phys.Rev.D80:023525,2009 · Extended motivation, matches published version in Phys. Rev. D
openalex publication_date 2009/07/28 · arxiv created 2009/09/15 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
We present counterexamples to the claim that the \ensuremathλ\ensuremathφ4 inflaton potential is excluded by recent cosmological data. Finding counterexamples requires that the actually observed primordial fluctuations are generated at the onset of the slow-roll regime of inflation. This setup for the initial conditions is therefore different from the usual scenario of chaotic inflation where inflation starts long before the observed fluctuations are created. The primordial power spectrum of ``just enough'' chaotic inflation violates scale invariance in a way consistent with observations.