Solid consistency

Lorenzo Bordin, Paolo Creminelli, Mehrdad Mirbabayi, Jorge Noreña

Research output: Contribution to journalArticlepeer-review

16 Scopus citations


We argue that isotropic scalar fluctuations in solid inflation are adiabatic in the super-horizon limit. During the solid phase this adiabatic mode has peculiar features: constant energy-density slices and comoving slices do not coincide, and their curvatures, parameterized respectively by ζ and , both evolve in time. The existence of this adiabatic mode implies that Maldacena's squeezed limit consistency relation holds after angular average over the long mode. The correlation functions of a long-wavelength spherical scalar mode with several short scalar or tensor modes is fixed by the scaling behavior of the correlators of short modes, independently of the solid inflation action or dynamics of reheating.

Original languageEnglish
Article number004
JournalJournal of Cosmology and Astroparticle Physics
Issue number3
StatePublished - 3 Mar 2017


  • cosmological perturbation theory
  • ination
  • non-gaussianity
  • primordial gravitational waves (theory)


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