Our Lopsided Universe


Cortes, M. (2014). Our Lopsided Universe. Perimeter Institute. https://pirsa.org/14020139


Cortes, Marina. Our Lopsided Universe. Perimeter Institute, Feb. 11, 2014, https://pirsa.org/14020139


          @misc{ pirsa_14020139,
            doi = {10.48660/14020139},
            url = {https://pirsa.org/14020139},
            author = {Cortes, Marina},
            keywords = {Cosmology},
            language = {en},
            title = {Our Lopsided Universe},
            publisher = {Perimeter Institute},
            year = {2014},
            month = {feb},
            note = {PIRSA:14020139 see, \url{https://pirsa.org}}

Marina Cortes Institute for Astrophysics and Space Sciences


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.