Testing quantum gravity effects with latest CMB observations
arXiv:1404.6672 · doi:10.1016/j.physletb.2014.06.019
Abstract
Inspired by quantum gravitational physics, the approach of non-commutative (NC) phase space leads to a modified dispersion relation of gravitational waves. This feature, if applied to the very early universe, gives rise to a modified power spectrum of primordial tensor perturbations with a suppression of power on large scales. We confront this phenomenon with the BICEP2 and Planck experiments, and show that inflation with the modified dispersion relation can simultaneously fit the observations better than the standard inflationary paradigm. In particular, the numerical result implies that with the latest cosmological microwave background (CMB) observations, a quantum gravity modified power spectrum of primordial tensor modes is preferred at a statistical significance of more than compared with the minimal model. Our study indicates that the potential tension between the BICEP2 and Planck data may be resolved by quantum gravity effects.
5 pages, 2 figures, comments are welcome
References in corpus (15)
- String Theory and Noncommutative Geometry
- Cosmological parameters from CMB and other data: a Monte-Carlo approach
- Noncommutative Geometry and Matrix Theory: Compactification on Tori
- A Generalized Uncertainty Principle in Quantum Gravity
- Noncommutative Field Theory and Lorentz Violation
- What would we learn by detecting a gravitational wave signal in the cosmic microwave background anisotropy?
- Tensor Modes from a Primordial Hagedorn Phase of String Cosmology
- Suppressing CMB Quadrupole with a Bounce from Contracting Phase to Inflation
- D-Particle Dynamics and The Space-Time Uncertainty Relation
- Noncommutativity in Field Space and Lorentz Invariance Violation
- Polarizing primordial gravitational waves by parity violation
- U(1) Noncommutative Gauge Fields and Magnetogenesis
- Effects of Nonlinear Dispersion Relations on Non-Gaussianities
- Probing Noncommutativity with Inflationary Gravitational Waves
- Vortices, Infrared effects and Lorentz Invariance Violation
Cited by in corpus (28)
- Measuring the speed of cosmological gravitational waves
- Effects of modified gravity on B-mode polarization
- Big Bounce Genesis
- On the possibility of blue tensor spectrum within single field inflation
- Nonsingular bouncing cosmologies in light of BICEP2
- Scale--dependent Hayward black hole and the generalized uncertainty principle
- Inflation and Alternatives with Blue Tensor Spectra
- Hubble tension bounds the GUP and EUP parameters
- Hubble tension as a guide for refining the early Universe: Cosmologies with explicit local Lorentz and diffeomorphism violation
- Particles in Loop Quantum Gravity formalism: a thermodynamical description
- Single field inflation with modulated potential in light of the Planck and BICEP2
- Dark matter in a bouncing universe
- Direct dark matter searches - Test of the Big Bounce Cosmology
- Pre-inflationary genesis with CMB B-mode polarization
- Effect of transitions in the Planck mass during inflation on primordial power spectra
- New model of axion monodromy inflation and its cosmological implications
- On the viability of Planck scale cosmology with quartessence
- Tensors, BICEP2, prior dependence, and dust
- Higher-order generalized uncertainty principle applied to gravitational baryogenesis
- Big Bounce Genesis and Possible Experimental Tests -- A Brief Review
- Noncommutative Geometry and the Primordial Dipolar Imaginary Power Spectrum
- Deformation of the quintom cosmological model and its consequences
- Precision of future experiments measuring primordial tensor fluctuation
- Gravitational radiation in dynamical noncommutative spaces
- The gravitational baryogenesis and a new higher-order extended uncertainty principle with parameter adaptability for the minimum length
- Large Angular Scale CMB Anisotropy from an Excited Initial Mode
- A Model of Spinfoam Coupled with an Environment
- Chaotic instantons in scalar field theory