Gravitational Radiation from Primordial Helical Turbulence
arXiv:astro-ph/0508459
Abstract
In present talk I show that primordial helical turbulence produced during a first-order phase transition induces circularly polarized cosmological gravitational waves (GWs). The degree of polarization as well as the characteristic frequency and the amplitude of these GWs depend crucially on phase-transition model of primordial turbulence. I present a brief discussion on the possibility of detection.
Talk given at ICTP workshop "Nonlinear Cosmology", ICTP, Trieste, Italy (May 2005). To appear in special volume of International Journal of Modern Physics D