Constraining matter-bounce scenario from scalar-induced vector perturbations
arXiv:2409.09458 · doi:10.1103/3qbj-3qp6
Abstract
Bouncing cosmologies, while offering a compelling alternative to inflationary models, face challenges from the growth of vector perturbations during the contracting phase. While linear vector instabilities can be avoided with specific initial conditions or the absence of vector degrees of freedom, we demonstrate the significant role of secondary vector perturbations generated by nonlinear interactions with scalar fluctuations. Our analysis reveals that in a broad class of single-field matter-bounce scenarios, these secondary vector perturbations get unacceptably large amplitudes, provided the curvature fluctuations are consistent with cosmic microwave background observations. This finding underscores the crucial importance of scalar-induced vector perturbations in bouncing cosmology and highlights the need for further investigation into their potential impact on the viability of these models.
References in corpus (70)
- Planck 2018 results. X. Constraints on inflation
- Essentials of k-essence
- The Ekpyrotic Universe: Colliding Branes and the Origin of the Hot Big Bang
- Generalized G-inflation: Inflation with the most general second-order field equations
- Non-Gaussianity from Inflation: Theory and Observations
- Perturbations in k-inflation
- The Trans-Planckian Problem of Inflationary Cosmology
- Second-Order Cosmological Perturbations from Inflation
- The phantom menaced: constraints on low-energy effective ghosts
- Can dark energy evolve to the Phantom?
- Primordial Non-Gaussianities from Inflation Models
- Inflationary spacetimes are not past-complete
- Towards a Nonsingular Bouncing Cosmology
- Bouncing Cosmologies: Progress and Problems
- Ekpyrotic and Cyclic Cosmology
- Primordial magnetogenesis
- A Critical Review of Classical Bouncing Cosmologies
- Trans-Planckian Censorship and the Swampland
- Exploring Bouncing Cosmologies with Cosmological Surveys
- A Nonsingular Cosmology with a Scale-Invariant Spectrum of Cosmological Perturbations from Lee-Wick Theory
- Inflationary non-Gaussianities in the most general second-order scalar-tensor theories
- Generic instabilities of non-singular cosmologies in Horndeski theory: a no-go theorem
- Cosmological perturbations through a simple bounce
- The Effective Field Theory of nonsingular cosmology
- Alternatives to Cosmological Inflation
- Primordial magnetic fields, anomalous isocurvature fluctuations and Big Bang nucleosynthesis
- Generalized Galileons: instabilities of bouncing and Genesis cosmologies and modified Genesis
- Inflation and primordial non-Gaussianities of "generalized Galileons"
- Gauge Independence of Induced Gravitational Waves
- Bouncing Cosmology made simple
- Non-Gaussianity in a Matter Bounce
- Anisotropy in a Nonsingular Bounce
- Constraints on the Sound Speed of Dynamical Dark Energy
- Stability of Geodesically Complete Cosmologies
- A covariant Lagrangian for stable nonsingular bounce
- On the Gauge Invariance of Cosmological Gravitational Waves
- Gauge dependence of gravitational waves generated from scalar perturbations
- Bouncing cosmologies with dark matter and dark energy
- The Effective Field Theory of nonsingular cosmology: II
- Cosmological bounce and Genesis beyond Horndeski
- Approximate gauge independence of the induced gravitational wave spectrum
- DHOST Bounce
- Evolution of cosmological perturbations and the production of non-Gaussianities through a nonsingular bounce: Indications for a no-go theorem in single field matter bounce cosmologies
- Cosmological vector modes and quantum gravity effects
- Generalized multi-Galileons, covariantized new terms, and the no-go theorem for non-singular cosmologies
- Nonsingular bouncing cosmologies in light of BICEP2
- Vector Perturbations in a Contracting Universe
- Matter bounce cosmology with a generalized single field: non-Gaussianity and an extended no-go theorem
- On the past-completeness of inflationary spacetimes
- Nonsingular cosmological models with strong gravity in the past
- Genesis with general relativity asymptotics in beyond Horndeski theory
- A Radiation Bounce from the Lee-Wick Construction?
- Pre-inflation and Trans-Planckian Censorship
- Large Adiabatic Scalar Perturbations in a Regular Bouncing Universe
- Lee-Wick radiation induced bouncing universe models
- The Stability of an Isotropic Cosmological Singularity in Higher-Order Gravity
- General theory of cosmological perturbations in open and closed universes from the Horndeski action
- Primordial non-Gaussianities of scalar and tensor perturbations in general bounce cosmology: Evading the no-go theorem
- Non-Gaussianity excess problem in classical bouncing cosmologies
- On the initial singularity and extendibility of flat quasi-de Sitter spacetimes
- On the Instability of the Lee-Wick Bounce
- Perturbative unitarity and NEC violation in genesis cosmology
- Unavoidable shear from quantum fluctuations in contracting cosmologies
- Production of non-gaussianities in a bouncing phase
- Massive gravity and the suppression of anisotropies and gravitational waves in a matter-dominated contracting universe
- Non-linear vector perturbations in a contracting universe
- On the strong coupling problem in cosmologies with "strong gravity in the past"
- Comments on "Growth of Covariant Perturbations in the Contracting Phase of a Bouncing Universe" by A. Kumar
- Point-splitting regularization of the stress tensor of a coupling scalar field in de Sitter space
- Primordial non-Gaussianity from Galilean Genesis without strong coupling problem