Constraining quantum collapse inflationary models with CMB data

Abstract

The hypothesis of the self-induced collapse of the inflaton wave function was proposed as responsible for the emergence of inhomogeneity and anisotropy at all scales. This proposal was studied within an almost de Sitter space-time approximation for the background, which led to a perfect scale-invariant power spectrum, and also for a quasi-de Sitter background, which allows to distinguish departures from the standard approach due to the inclusion of the collapse hypothesis. In this work we perform a Bayesian model comparison for two different choices of the self-induced collapse in a full quasi-de Sitter expansion scenario. In particular, we analyze the possibility of detecting the imprint of these collapse schemes at low multipoles of the anisotropy temperature power spectrum of the Cosmic Microwave Background (CMB) using the most recent data provided by the Planck Collaboration. Our results show that one of the two collapse schemes analyzed provides the same Bayesian evidence of the minimal standard cosmological model $\Lambda$CDM, while the other scenario is weakly disfavoured with respect to the standard cosmology.

15 pages, 8 figures

References in corpus (25)

• Planck 2015 results. XIII. Cosmological parameters
• Efficient Computation of CMB anisotropies in closed FRW models
• Cosmological parameters from CMB and other data: a Monte-Carlo approach
• MultiNest: an efficient and robust Bayesian inference tool for cosmology and particle physics
• Multimodal nested sampling: an efficient and robust alternative to MCMC methods for astronomical data analysis
• Decoherence, the measurement problem, and interpretations of quantum mechanics
• Models of Wave-function Collapse, Underlying Theories, and Experimental Tests
• Dynamical Reduction Models
• Planck 2015 results. XI. CMB power spectra, likelihoods, and robustness of parameters
• Applications of Bayesian model selection to cosmological parameters
• Relativistic state reduction dynamics
• On the quantum origin of the seeds of cosmic structure
• Why Decoherence has not Solved the Measurement Problem: A Response to P. W. Anderson
• Shortcomings in the Understanding of Why Cosmological Perturbations Look Classical
• CSL Wave Function Collapse Model as a Mechanism for the Emergence of Cosmological Asymmetries in Inflation
• Lack of large-angle TT correlations persists in WMAP and Planck
• A Relativistic Dynamical Collapse Model
• Phenomenological analysis of quantum collapse as source of the seeds of cosmic structure
• Towards a formal description of the collapse approach to the inflationary origin of the seeds of cosmic structure
• Cosmological constraints on non-standard inflationary quantum collapse models
• Quantum origin of the primordial fluctuation spectrum and its statistics
• The slow roll condition and the amplitude of the primordial spectrum of cosmic fluctuations: Contrasts and similarities of standard account and the "collapse scheme"
• Multiple quantum collapse of the inflaton field and its implications on the birth of cosmic structure
• Inflation including collapse of the wave function: The quasi-de Sitter case
• Primordial gravitational waves and the collapse of the wave function

Cited by in corpus (16)

• Consistent Scalar and Tensor Perturbation Power Spectra in Single Fluid Matter Bounce with Dark Energy Era
• Testing non-minimally coupled inflation with CMB data: a Bayesian analysis
• CMB constraints on $\beta$-exponential inflationary models
• A Bayesian analysis of inflationary primordial spectrum models using Planck data
• Expectation of primordial gravity waves generated during inflation
• Space-time second-quantization effects and the quantum origin of cosmological constant in covariant quantum gravity
• Constraining quantum collapse inflationary models with current data: The semiclassical approach
• Testing scale-invariant inflation against cosmological data
• Eternal inflation and the quantum birth of cosmic structure
• Constraining the Break of Spatial Diffeomorphism Invariance with Planck Data
• Constraining non-minimally coupled $\beta$-exponential inflation with CMB data
• Enlightening the CSL model landscape in inflation
• Emergent universe: tensor perturbations within the CSL framework
• Emergent universe revisited through the CSL theory
• Observational constraints on inflationary potentials within the quantum collapse framework
• Constraining tachyonic inflationary β-exponential model with Continuous Spontaneous Localization collapse scheme