The Effective Field Theory of nonsingular cosmology: II

Abstract

Based on the Effective Field Theory (EFT) of cosmological perturbations, we explicitly clarify the pathology in nonsingular cubic Galileon models and show how to cure it in EFT with new insights into this issue. With the least set of EFT operators that are capable to avoid instabilities in nonsingular cosmologies, we construct a nonsingular model dubbed the Genesis-inflation model, in which a slowly expanding phase (namely, Genesis) with increasing energy density is followed by slow-roll inflation. The spectrum of the primordial perturbation may be simulated numerically, which shows itself a large-scale cutoff, as the large-scale anomalies in CMB might be a hint for.

arXiv comment20 pages, 1 table, 9 figures; published in EPJC

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Cited by in corpus (74)

• Horndeski theory and beyond: a review
• Compact stars in Energy-Momentum Squared Gravity
• A covariant Lagrangian for stable nonsingular bounce
• The effective field theory approach of teleparallel gravity, $f(T)$ gravity and beyond
• Extended matter bounce scenario in ghost free $f(R,\mathcal{G})$ gravity compatible with GW170817
• DHOST Bounce
• Primordial backgrounds of relic gravitons
• Cuscuton Bounce
• Primordial black holes from null energy condition violation during inflation
• Scalar and Tensor Perturbations in DHOST Bounce Cosmology
• Intermittent null energy condition violations during inflation and primordial gravitational waves
• Cosmological perturbations and stability of nonsingular cosmologies with limiting curvature
• A non-singular bouncing cosmology in $f(R,T)$ gravity
• Bounce cosmology in $f(\mathcal{R})$ gravity
• Pulsar timing array observations as possible hints for nonsingular cosmology
• Pre-inflation and Trans-Planckian Censorship
• Primordial perturbations with pre-inflationary bounce
• Higher order derivative coupling to gravity and its cosmological implications
• Bounce in GR and higher-order derivative operators
• Null energy condition violation during inflation and pulsar timing array observations
• Generating enhanced parity-violating gravitational waves during inflation with violation of the null energy condition
• Nanohertz gravitational waves from NEC violation in the early universe
• Effective Theory of Inflationary Magnetogenesis and Constraints on Reheating
• Primordial non-Gaussianities of scalar and tensor perturbations in general bounce cosmology: Evading the no-go theorem
• Generating enhanced primordial GWs during inflation with intermittent violation of NEC and diminishment of GW propagating speed
• Improved DHOST Genesis
• Obviating PBH overproduction for SIGWs generated by Pulsar Timing Arrays in loop corrected EFT of bounce
• Implication of GW170817 for cosmological bounces
• Positivity in the effective field theory of cosmological perturbations
• Spectrum of Cuscuton Bounce
• Stable Cosmic Time Crystals
• Bouncing Cosmology in VCDM
• Nonsingular bouncing cosmology from general relativity: Scalar metric perturbations
• Perturbations of bounce inflation scenario from $f(T)$ modified gravity revisited
• Perturbative unitarity and NEC violation in genesis cosmology
• Parity-violation in bouncing cosmology
• Evading the theoretical no-go theorem for nonsingular bounces in Horndeski/Galileon cosmology
• Spinor driven cosmic bounces and their cosmological perturbations
• Singularities in Spherically Symmetric Solutions with Limited Curvature Invariants
• Higher derivative scalar-tensor theory from the spatially covariant gravity: a linear algebraic analysis
• Explanatory Depth in Primordial Cosmology: A Comparative Study of Inflationary and Bouncing Paradigms
• Regularized-Renormalized-Resummed loop corrected power spectrum of non-singular bounce with Primordial Black Hole formation
• On Bouncing and Nonsingular Solutions in Einstein-scalar-Gauss-Bonnet Cosmology
• Stable cosmological solutions in Horndeski theory
• Primordial non-Gaussianity from Galilean Genesis without strong coupling problem
• Creation of wormholes during the cosmological bounce
• Probing signatures of bounce inflation with current observations
• Averaged Energy Conditions and Bouncing Universes
• Helicity form factors for $D_{(s)}\to A\ell \nu$ process in the light-cone QCD sum rules approach
• Constraints on Inflation with Null Energy Condition Violation from Advanced LIGO and Advanced Virgo's First Three Observing Runs
• Eternal Universes
• Parity violation in primordial tensor non-Gaussianities from matter bounce cosmology
• Stable Singularity-free Cosmological Solutions in non-projectable Horava-Lifshitz Gravity
• Negative non-Gaussianity as a salvager for PBHs with PTAs in bounce
• Banks-Zaks Cosmology, Inflation, and the Big Bang Singularity
• Cuscuton Bounce Beyond the Linear Regime: Bispectrum and Strong Coupling Constraints
• Higher derivative SVT theories from Kaluza-Klein reductions of Horndeski theory
• Interpreting Pulsar Timing Array data of Gravitational Waves with Ekpyrosis-Bouncing Cosmology
• A gauge invariant prescription to avoid $\gamma$-crossing instability in Galileon bounce
• How Much NEC Breaking Can the Universe Endure?
• Parity-violating primordial gravitational waves from null energy condition violation
• Climbing over the potential barrier during inflation via null energy condition violation
• Evolution of Generalized Brans-Dicke parameter within a Superbounce scenario
• Healthy Horndeski cosmologies with torsion
• Recent Developments in Degenerate Higher Order Scalar Tensor Theories
• Confronting Inflation Models with the Coming Observations on Primordial Gravitational Waves
• Perturbations in Horndeski theory above anisotropic cosmological background
• Derivative coupling of inflaton to $R^{(3)}$
• Time crystals in primordial perturbations
• Constraining matter-bounce scenario from scalar-induced vector perturbations
• Gravitational Waves from Primordial Black Holes formed by Null Energy Condition Violation during Inflation
• Geodesically Complete Curvature-Bounce Inflation
• Non-minimal Effective Scalar-Tensor Gravity in the Early Universe
• Crunching, Bouncing, and Cyclical Cosmologies from Dark Sector Interactions