Priyanka Singh (Raman Research Institute)
Carlo Baccigalupi (SISSA, Triesste)
We review the mechanisms leading to Gravitational Waves imprint in the B-modes of Cosmic Microwave Background Polarization Anisotropy. We discuss the current status of measurements, and the main challenges towards future precision measurements, focusing on the diffuse polarization emission from our own Galaxy. Finally, we outline the path ahead in terms of operating and planned CMB B-mode experiments.
