Open inflation models and gravitational wave anisotropies in the CMB

Abstract

We study the large scale power spectrum of gravitational wave perturbations of the microwave background in the context of single-bubble open inflation models. We compute the ratio of tensor to scalar contributions to the CMB anisotropies as a function of ${\Omega }_0$, the spectral index $n_S$ and the tunneling parameter $2\pi G{S}_1/H$. We find that gravitational wave anisotropies can be very large at small values of this tunneling parameter. We also consider the contribution of supercurvature and bubble wall modes and find constraints on the parameters of open inflation models from the observed temperature anisotropies of the CMB. We show that the induced gravity and open hybrid scenarios are compatible with present observations for a reasonable range of parameters.

Revised version accepted in Physical Review D

References in corpus (4)

• The Spectrum of Gravitational Wave Perturbations in the One-Bubble Open Inflationary Universe
• Primordial Gravitational Waves From Open Inflation
• Wall fluctuation modes and tensor CMB anisotropy in open inflation models
• Tilted Hybrid Inflation

Cited by in corpus (16)

• Canonical Quantization of Cosmological Perturbations in the One Bubble Open Universe
• What Can Cosmic Microwave Background Observations Already Say About Cosmological Parameters in Open and Critical-Density Cold Dark Matter Models?
• Open inflation in the landscape
• Spectrum of Cosmological Perturbations in the One-Bubble Open Universe
• The density parameter and the Anthropic Principle
• Quasi-open inflation
• Simulating the universe(s): from cosmic bubble collisions to cosmological observables with numerical relativity
• Multi-field open inflation model and multi-field dynamics in tunneling
• Cross-Correlating Probes of Primordial Gravitational Waves
• Bispectrum from open inflation
• Extended open inflationary universes
• An Observational Test of Quantum Cosmology
• Asymptotic and Exact Solutions of Perfect-Fluid Scalar-Tensor Cosmologies
• Microwave background anisotropies in quasiopen inflation
• Fluctuations in the Hawking Turok model
• An Open Universe from Valley Bounce