Primordial Gravitational Waves and Cosmology

TL;DR

Detecting primordial gravitational waves could revolutionize our understanding of the early universe, offering insights into inflation and physics at energy scales far beyond current experimental reach.

Contribution

This paper reviews the potential of primordial gravitational wave detection to inform cosmology and fundamental physics, emphasizing upcoming observational prospects.

Findings

Primordial gravitational waves could confirm inflationary models.

Detection would constrain physics from GUT to Planck scale.

Upcoming experiments may soon observe these waves.

Abstract

The observation of primordial gravitational waves could provide a new and unique window on the earliest moments in the history of the universe, and on possible new physics at energies many orders of magnitude beyond those accessible at particle accelerators. Such waves might be detectable soon in current or planned satellite experiments that will probe for characteristic imprints in the polarization of the cosmic microwave background (CMB), or later with direct space-based interferometers. A positive detection could provide definitive evidence for Inflation in the early universe, and would constrain new physics from the Grand Unification scale to the Planck scale.