CSL Wave Function Collapse Model as a Mechanism for the Emergence of Cosmological Asymmetries in Inflation

TL;DR

This paper proposes a novel mechanism using the CSL wave function collapse model to explain the emergence of primordial cosmic anisotropies during inflation, addressing limitations of previous symmetric quantum descriptions.

Contribution

It introduces the application of the CSL collapse model to inflationary cosmology, providing a stochastic non-unitary process that generates asymmetries from symmetric initial conditions.

Findings

CSL model induces inhomogeneities consistent with CMB observations

The approach explains the transition from symmetric quantum states to classical inhomogeneities

Compatibility with precise CMB data is demonstrated

Abstract

As previously discussed in (D. Sudarsky, Int.J.Mod.Phys.D20:509-552, (2011); [arXiv:0906.0315]), the inflationary account for the emergence of the seeds of cosmic structure falls short of actually explaining the generation of primordial anisotropies and inhomogeneities. This description starts from a symmetric background, and invokes symmetric dynamics, so it cannot explain asymmetries. To generate asymmetries, we present an application of the Continuous Spontaneous Localization (CSL) model of wave function collapse (P. Pearle, Phys. Rev. A 39, 2277, (1989); G. C. Ghirardi, P. Pearle and A. Rimini, Phys. Rev. A42, 78 (1990)) in the context of inflation. This modification of quantum dynamics introduces a stochastic non-unitary component to the evolution of the inflaton field perturbations. This leads to passage from a homogeneous and isotropic stage to another, where the quantum uncertainties in the initial state of inflation transmute into the primordial inhomogeneities and anisotropies. We examine requirements for, and show how to achieve, compatibility with the precise observations of the cosmic microwave background (CMB) radiation.