PIRSA:14020139

Video URL

http://pirsa.org/14020139

Our Lopsided Universe

Cortes, M. (2014). Our Lopsided Universe. Perimeter Institute for Theoretical Physics. http://pirsa.org/14020139

Cortes, Marina. Our Lopsided Universe. Perimeter Institute for Theoretical Physics, Feb. 11, 2014, http://pirsa.org/14020139 

          @misc{ scitalks_PIRSA:14020139,
            doi = {},
            url = {http://pirsa.org/14020139},
            author = {Cortes, Marina},
            keywords = {Cosmology},
            language = {en},
            title = {Our Lopsided Universe},
            publisher = {Perimeter Institute for Theoretical Physics},
            year = {2014},
            month = {feb},
            note = {PIRSA:14020139 see, \url{https://scivideos.org/PIRSA/14020139}}
          }

Marina Cortes Institute for Astrophysics and Space Sciences

Source Repository PIRSA
Collection
Talk Type Scientific Series
Subject

Abstract

After a short introduction to open inflation and the observed large-scale cosmic microwave anomalies, which have been confirmed by the Planck satellite, I'll argue that the anomalies are naturally explained in the context of a marginally-open, negatively curved universe. I'll look in particular at the dipole power asymmetry, and motivate that this asymmetry can happen if our universe has bubble nucleated in a phase transition during a period of early inflation, and, as a result, has open geometry. Open inflation models, which are motivated by the string landscape and can excite `super-curvature' perturbation modes, can explain the presence of a very-large-scale perturbation, like the one we observe, which leads to a dipole modulation of the power spectrum. I'll provide a specific implementation of the scenario which is compatible with all existing constraints.