Simulating the Universe(s)


Johnson, M. (2014). Simulating the Universe(s). Perimeter Institute. https://pirsa.org/14010101


Johnson, Matthew. Simulating the Universe(s). Perimeter Institute, Jan. 14, 2014, https://pirsa.org/14010101


          @misc{ pirsa_14010101,
            doi = {},
            url = {https://pirsa.org/14010101},
            author = {Johnson, Matthew},
            keywords = {Cosmology},
            language = {en},
            title = {Simulating the Universe(s)},
            publisher = {Perimeter Institute},
            year = {2014},
            month = {jan},
            note = {PIRSA:14010101 see, \url{https://pirsa.org}}


The theory of eternal inflation in an inflaton potential with multiple vacua predicts that our universe is one of many bubble universes nucleating and growing inside an ever-expanding false vacuum. The collision of our bubble with another could provide an important observational signature to test this scenario. In this talk I will describe an algorithm for accurately computing the cosmological observables arising from bubble collisions directly from the Lagrangian of a single scalar field. This represents the first fully-relativistic set of predictions from an ensemble of scalar field models giving rise to eternal inflation, and I will describe on-going phenomenological studies and observational searches.