On signatures of spontaneous collapse dynamics modified single field inflation

Abstract

The observed classicality of primordial perturbations, despite their quantum origin during inflation, calls for a mechanism for quantum-to-classical transition of these initial fluctuations. As literature suggests a number of plausible mechanisms which try to address this issue, it is of importance to seek for concrete observational signatures of these several approaches in order to have a better understanding of the early universe dynamics. Among these several approaches, it is the spontaneous collapse dynamics of Quantum Mechanics which is most viable of leaving discrete observational signatures as collapse mechanism inherently changes the generic Quantum dynamics. We observe in this study that the observables from the scalar sector, i.e. scalar tilt $n_s$, running of scalar tilt ${\alpha }_s$ and running of running of scalar tilt ${\beta }_s$, can not potentially distinguish a collapse modified inflationary dynamics in the realm of canonical scalar field and $k-$inflationary scenarios. The only distinguishable imprint of collapse mechanism lies in the observables of tensor sector in the form of modified consistency relation and a blue-tilted tensor spectrum only when the collapse parameter $\delta$ is non-zero and positive.

14 pg, 2 tables, 0 figs, v2: Version accepted for publication on Phys. Rev. D. Title of the paper modified slightly

References in corpus (5)

• Blue-tilted Tensor Spectrum and Thermal History of the Universe
• Warm inflation dissipative effects: predictions and constraints from the Planck data
• Nflation: multi-field inflationary dynamics and perturbations
• Classicalization of inflationary perturbations by collapse models in the light of BICEP2
• Curvaton in large field inflation

Cited by in corpus (5)

• Present status and future challenges of non-interferometric tests of collapse models
• Impact of dynamical collapse models on inflationary cosmology
• Constraining quantum collapse inflationary models with current data: The semiclassical approach
• The `unitarity problem' of Higgs inflation in the light of collapse dynamics
• Quantum Physics in Space