Cosmic Information, the Cosmological Constant and the Amplitude of primordial perturbations release_5xvgrzi6tbhgpckargojtlg5hq

by T. Padmanabhan, Hamsa Padmanabhan

Released as a article .

2017  

Abstract

A unique feature of gravity is its ability to control the information accessible to any specific observer. We quantify the notion of cosmic information ('CosmIn') for an eternal observer in the universe. Demanding the finiteness of CosmIn requires the universe to have a late-time accelerated expansion. Combining the introduction of CosmIn with generic features of the quantum structure of spacetime (e.g., the holographic principle), we present a holistic model for cosmology. We show that (i) the numerical value of the cosmological constant, as well as (ii) the amplitude of the primordial, scale invariant, perturbation spectrum can be determined in terms of a single free parameter, which specifies the energy scale at which the universe makes a transition from a pre-geometric phase to the classical phase. For a specific value of the parameter, we obtain the correct results for both (i) and (ii). This formalism also shows that the quantum gravitational information content of spacetime can be tested using precision cosmology.
In text/plain format

Archived Files and Locations

application/pdf  161.7 kB
file_lh2xm7rxd5gxbeinmkrouepxsy
arxiv.org (repository)
web.archive.org (webarchive)
Read Archived PDF
Preserved and Accessible
Type  article
Stage   submitted
Date   2017-03-17
Version   v1
Language   en ?
arXiv  1703.06144v1
Work Entity
access all versions, variants, and formats of this works (eg, pre-prints)
Catalog Record
Revision: 4169f97b-27ed-4834-8815-7b3458efce1f
API URL: JSON