Obtaining the CMB anomalies with a bounce from the contracting phase to inflation

Abstract

Recent Planck data show the anomalies of CMB fluctuations on large angular scales, which confirms the early observations by WMAP. We continue studying an inflationary model, in which before the slow roll inflation the universe is in a contracting phase, and fit the model with the Planck data. It is showed that this model may generate not only the power deficit at low-l, but also a large hemispherical power asymmetry in CMB. We also discuss the implication of the result to the eternal inflation scenario.

21 pages, 9 figs, refs.added, Sec.III.B is written in detail, and how the primordial cutoff spectrum on large angular scale gives a large hemisphere asymmetry is showed, to publish in PRD

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Cited by in corpus (104)

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• Bouncing cosmology with future singularity from modified gravity
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• Observational issues in loop quantum cosmology
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• A quantitative analysis of singular inflation with scalar-tensor and modified gravity
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• Hemispherical Asymmetry and Local non-Gaussianity: a Consistency Condition
• Asymmetric Sky from the Long Mode Modulations
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• CMB dipole asymmetry from a fast roll phase
• CMB anomalies from an inflationary model in string theory
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• Pre-inflationary primordial perturbations
• Pre - Inflationary Clues from String Theory ?
• Hemispherical Power Asymmetry from a Space-Dependent Component of the Adiabatic Power Spectrum
• Pre-inflation and Trans-Planckian Censorship
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• Bounce in GR and higher-order derivative operators
• Testing the Dipole Modulation Model in CMBR
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• Parity-violation in bouncing cosmology
• CMB hemispherical asymmetry from non-linear isocurvature perturbations
• Imprint of Inhomogeneous and Anisotropic Primordial Power Spectrum on CMB Polarization
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• Scale-dependent CMB asymmetry from primordial configuration
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• Lensing as a Probe of Early Universe: from CMB to Galaxies
• $f(\mathcal{G},\text{T})$ Gravity Bouncing Universe with Cosmological Parameters
• Implication of island for inflation and primordial perturbations
• Low-$\ell$ power suppression in punctuated inflation
• Intricacies of Cosmological bounce in polynomial metric $f(R)$ gravity for flat FLRW spacetime
• Scale-dependent hemispherical asymmetry from general initial state during inflation
• Probing signatures of bounce inflation with current observations
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• Pre-Inflationary Relics in the CMB?
• Primordial anisotropies from cosmic strings during inflation
• Possible Evidence for Planck-Scale Resonant Particle Production during Inflation from the CMB Power Spectrum
• Scale-dependent CMB power asymmetry from primordial speed of sound and a generalized $\delta$N formalism
• Testing the scale-dependent hemispherical asymmetry with the 21-cm power spectrum from the epoch of reionization
• Primordial inhomogeneities from massive defects during inflation
• Stochastic collapse
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• Towards the bounce inflationary gravitational wave
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• Pre-inflation from the multiverse: Can it solve the quadrupole problem in the cosmic microwave background?
• Perturbations in Bouncing and Cyclic Models, a General Study
• Parity-violating primordial gravitational waves from null energy condition violation
• Large Angular Scale CMB Anisotropy from an Excited Initial Mode
• Effects on the CMB from Compactification Before Inflation
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• Populating the landscape in an inhomogeneous universe
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• Detecting CMB modulations and non-Gaussianities from power multipoles
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• AdS cycles in eternally inflating background
• Spectator fields and their imprints on the Cosmic Microwave Background