Stochastic background of gravitational waves from cosmological sources

Abstract

Gravitational waves (GW) can constitute a unique probe of the primordial universe. In many cases, the characteristic frequency of the emitted GW is directly related to the energy scale at which the GW source is operating in the early universe. Consequently, different GW detectors can probe different energy scales in the evolution of the universe. After a general introduction on the properties of a GW stochastic background of primordial origin, some examples of cosmological sources are presented, which may lead to observable GW signals.

Proceedings of LISA Symposium X, accepted for publication in Journal of Physics: Conference Series. Typos corrected, two references added

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• Testing the Early Universe with Anisotropies of the Gravitational Wave Background
• Cross-correlations as a Diagnostic Tool for Primordial Gravitational Waves
• Constraining the Cosmic Strings Gravitational Wave Spectra in No Scale Inflation with Viable Gravitino Dark matter and Non Thermal Leptogenesis
• A weakly-parametric approach to stochastic background inference in LISA
• Impact of trans-Planckian quantum noise on the Primordial Gravitational Wave spectrum
• Observable CMB B-modes from Cosmological Phase Transitions
• Test of the Statistical Isotropy of the Universe using Gravitational Waves
• Testing the equivalence principle and discreteness of spacetime through the $t^3$ gravitational phase with quantum information technology