Experimental Quantum Cosmology with the BICEP CMB Polarimeter

          @misc{ scivideos_PIRSA:09090006,
            doi = {10.48660/09090006},
            url = {https://pirsa.org/09090006},
            author = {Keating, Brian},
            keywords = {},
            language = {en},
            title = {Experimental Quantum Cosmology with the BICEP CMB Polarimeter},
            publisher = {Perimeter Institute for Theoretical Physics},
            year = {2009},
            month = {sep},
            note = {PIRSA:09090006 see, \url{https://scivideos.org/index.php/pirsa/09090006}}
          }
          

Abstract

The Background Imager of Cosmic Extragalactic Polarization (BICEP) experiment is the first polarimeter developed to measure the inflationary B-mode polarization of the CMB. During three seasons of observing at the South Pole, Antarctica beginning in 2006, BICEP mapped 2% of the sky chosen to be clean of polarized foreground emission, with sub-degree resolution. In this colloquium I will present initial results derived from a subset of the data acquired during the first two years of data and discuss the unique design features of BICEP which led to the first meaningful limits on the tensor-to-scalar ratio to come from B-mode polarization. Recently, Xia, Li & Zhang (2009) have claimed a detection of parity-violating "cosmic birefringence" effects using publicly available BICEP data. I will discuss polarimetric fidelity in the light of systematic errors and how such effects are particularly pernicious for probes of cosmic parity violation. I will conclude with a discussion demonstrating how BICEP, and its successor "BICEP2" will inform future measurements of the inflationary gravitational wave background and cosmic birefringence.