Power spectrum nulls due to non-standard inflationary evolution

@article{Goswami2011PowerSN,
  title={Power spectrum nulls due to non-standard inflationary evolution},
  author={Gaurav Goswami and Tarun Souradeep},
  journal={Physical Review D},
  year={2011},
  volume={83},
  pages={023526}
}
IUCAA, Post Bag 4, Ganeshkhind, Pune-411007, India(Dated: January 7, 2011)The simplest models of inflation based on slow roll produce nearly scale invariant primordial powerspectra (PPS). But there are also numerous models that predict radically broken scale invariant PPS.In particular, markedly cuspy dips in the PPS correspond to nulls where the perturbation amplitude,hence PPS, goes through a zero at a specific wavenumber. Near this wavenumber, the true quantumnature of the generation mechanism… 

Figures from this paper

Primordial power spectrum features and consequences

The present Cosmic Microwave Background (CMB) temperature and polarization anisotropy data is consistent with not only a power law scalar primordial power spectrum (PPS) with a small running but also

Joint Planck and WMAP assessment of low CMB multipoles

The remarkable progress in cosmic microwave background (CMB) studies over past decade has led to the era of precision cosmology in striking agreement with the ΛCDM model. However, the lack of power

Reconstruction of the primordial power spectrum of curvature perturbations using multiple data sets

Detailed knowledge of the primordial power spectrum of curvature perturbations is essential both in order to elucidate the physical mechanism (`inflation') which generated it, and for estimating the

Reconstruction of the primordial power spectrum of curvature perturbations using multiple data sets

Detailed knowledge of the primordial power spectrum of curvature perturbations is essential both in order to elucidate the physical mechanism (`inflation') which generated it, and for estimating the

New Developments in Cosmology

In this Thesis I discuss several recent results obtained using the CMB spectra measured by Planck and several other cosmological probes. Extensions of the $\Lambda$CDM model are studied, including

References

SHOWING 1-10 OF 10 REFERENCES

New Constraints on Oscillations in the Primordial Spectrum of Inflationary Perturbations

We revisit the problem of constraining steps in the inflationary potential with cosmological data. We argue that a step in the inflationary potential produces qualitatively similar oscillations in

The Primordial Density Perturbation

The origin and evolution of the primordial perturbation is the key to understanding structure formation in the earliest stages of the Universe. It carries clues to the types of physical phenomena

Nucl

  • Phys. B 282, 555
  • 1987

Phys

  • Rev. D 72, 043514 (2005); S. Weinberg Phys. Rev. D 74, 023508
  • 2006

Rev

  • D 70, 043523 (2004); R. Sinha and T. Souradeep Phy. Rev. D 74, 043518 (2006); A. Shafieloo, T. Souradeep, P. Manimaran, P.K. Panigrahi and R. Rangarajan Phy. Rev. D 75, 123502 (2007); A. Shafieloo and T. Souradeep Phy. Rev. D 78, 023511
  • 2008

ZhETF Pis ma Redaktsiiu

  • Physics Letters B
  • 1981

Phys

  • Lett. B 91, 99 (1980); D. Kazanas, Ap. J. 241, L59 (1980); A. H. Guth, Phys. Rev. D 23, 347 (1981); A. D. Linde, Phys. Lett. B108, 389 (1982); A. Albrecht and P. J. Steinhardt, Phys. Rev. Lett. 48, 1220
  • 1982

Starobinsky Pis’ma Zh

  • Éksp. Teor. Fiz. 55,
  • 1992

Nucl

  • Phys. B 385, 623
  • 1992

Phys

  • Lett. B 356, 196
  • 1995