Solid Inflation
By S. Endlich, Alberto Nicolis, Junpu Wang. 2012
248 citations recorded by the source corpus.
We develop a cosmological model where primordial inflation is driven by a 'solid', defined as a system of three derivatively coupled scalar fields obeying certain symmetries and spontaneously breaking a certain subgroup of these. The symmetry breaking pattern differs drastically from that of standard inflationary models: time translations are unbroken. This prevents our model from fitting into the standard effective field theory description of adiabatic perturbations, with crucial consequences for the dynamics of cosmological perturbations. Most notably, non-gaussianities in the curvature perturbations are unusually large, with f_NL ~ 1/(\epsilon.c_s^2), and have a novel shape: peaked in the squeezed limit, with anisotropic dependence on how the limit is approached. Other unusual features include the absence of adiabatic fluctuation modes during inflation---which does not impair their presence and near scale-invariance after inflation---and a slightly blue tilt for the tensor modes.
Subfields: Astronomy and Astrophysics, Nuclear and High Energy Physics, Oceanography
View Paper: https://www.semanticscholar.org/paper/386ce757d23650de1da10c81c60159fe0dc35d0f
How researchers see this paper
The researchers whose trusted networks rank it highest, strongest advocate first. Every researcher gets a different order.
In Astronomy and Astrophysics
In Nuclear and High Energy Physics
In Oceanography
Citations in the corpus
- CMB-S4 Science Case, Reference Design, and Project Plan (2019, background): “, solid inflation [124] or gauge-flation [125, 126]); gravitational waves not produced as vacuum fluctuations; or multiple tensors (e.”
- Planck 2015 results. XVII. Constraints on primordial non-Gaussianity (2015, unknown): “Quite interestingly, in the proposed “solid inflation” scenario (Endlich et al. 2013, 2014; see also Bartolo et al. 2013b, 2014; Sitwell & Sigurdson 2014) bispectra similar to Eq.”
- Solid holography and massive gravity (2015, background): “27) of the scalar fields is similar to the effective field theories used to describe perfect fluids [19] and solids [20, 21].”
- Exploring cosmic origins with CORE: Inflation (2016, background): “Alternatively, a blue tensor tilt can also arise in models with a nonstandard spacetime symmetry breaking pattern, such as solid [108] or supersolid [109] inflation.”
- Zoology of condensed matter: framids, ordinary stuff, extra-ordinary stuff (2015, background): “of ordinary matter (solids, fluids, superfluids, supersolids), where each Goldstone field in the Lagrangian carries at least one derivative, and so at the two-derivative level there are no interactions [3, 26].”
- Single-field consistency relations of large scale structure part II: resummation and redshift space (2013, background): “In models where the 3-point function in the squeezed limit depends on the direction of ~q, such as Solid Inflation [45], this dependence has a quadrupolar structure.”
- An infinite set of Ward identities for adiabatic modes in cosmology (2013, background): “(2)One exception, for instance, is the Solid Inflation model proposed recently [35].”
- Planck 2018 results. IX. Constraints on primordial non-Gaussianity (2019, background): “The so-called “solid inflation” models (Endlich et al. 2013; see also Bartolo et al. 2013b; Endlich et al. 2014; Sitwell & Sigurdson 2014; Bartolo et al. 2014) also predict bispectra of the form Eq.”
- Science with the space-based interferometer LISA. IV: probing inflation with gravitational waves (2016, background): “• Primordial non-Gaussianities can be enhanced (but not at a level to be excluded by current constraints) and have distinctive features as an angular dependent squeezed limit of bispectrum for the scalar three-point function [126, 130, 147].”