Bound on induced gravitational waves during inflation era

@article{Inomata2021BoundOI,
  title={Bound on induced gravitational waves during inflation era},
  author={Keisuke Inomata},
  journal={Physical Review D},
  year={2021}
}
We put the upper bound on the gravitational waves (GWs) induced by the scalar-field fluctuations during the inflation. In particular, we focus on the case where the scalar fluctuations get amplified within some subhorizon scales by some mechanism during the inflation. Since the energy conservation law leads to the upper bound on the energy density of the scalar fluctuations, the amplitude of the scalar fluctuations are constrained and therefore the induced GWs are also. Taking into account this… 

Figures from this paper

References

SHOWING 1-10 OF 115 REFERENCES
Gravitational waves from resonant amplification of curvature perturbations during inflation
Parametric resonance in a single-field inflationary model with a periodic structure on the potential gives rise to curvature perturbations with large amplitudes on small scales, which could result in
Gravitational waves induced by scalar perturbations during a gradual transition from an early matter era to the radiation era
We revisit the effects of an early matter-dominated era on gravitational waves induced by scalar perturbations. We carefully take into account the evolution of the gravitational potential, the source
Constraints on primordial curvature perturbations from primordial black hole dark matter and secondary gravitational waves
Primordial black holes and secondary gravitational waves can be used to probe the small scale physics at very early time. For secondary gravitational waves produced after the horizon reentry, we
Non-Gaussianity and the induced gravitational wave background
Scalar metric fluctuations generically source a spectrum of gravitational waves at second order in perturbation theory, poising gravitational wave experiments as potentially powerful probes of the
Gravitational Wave signatures of inflationary models from Primordial Black Hole Dark Matter
Primordial Black Holes (PBH) could be the cold dark matter of the universe. They could have arisen from large (order one) curvature fluctuations produced during inflation that reentered the horizon
Resonant multiple peaks in the induced gravitational waves
We identify analytically a multiple-peak structure in the energy-density spectrum of induced gravitational waves (GWs) generated at second-order from a primordial scalar perturbations also with
Constraints on scalar and tensor spectra from Neff
At the linear level, the gravitational wave (GW) spectrum predicted by inflation, and many of its alternatives, can have arbitrarily small amplitude and consequently an unconstrained tilt. However,
Can a spectator scalar field enhance inflationary tensor mode
We consider the possibility of enhancing the inflationary tensor mode by introducing a spectator scalar field with a small sound speed which induces gravitational waves as a second order effect. We
Gravitational Waves and Scalar Perturbations from Spectator Fields
The most conventional mechanism for gravitational waves (gw) production during inflation is the amplification of vacuum metric fluctuations. In this case the gw production can be uniquely related to
A cosmological signature of the SM Higgs instability: gravitational waves
A fundamental property of the Standard Model is that the Higgs potential becomes unstable at large values of the Higgs field. For the current central values of the Higgs and top masses, the
...
1
2
3
4
5
...