PIRSA:08070048

Simulating the Big Bang

Frolov, A. (2008). Simulating the Big Bang. Perimeter Institute. https://pirsa.org/08070048

Frolov, Andrei. Simulating the Big Bang. Perimeter Institute, Jul. 29, 2008, https://pirsa.org/08070048 

          @misc{ pirsa_PIRSA:08070048,
            doi = {10.48660/08070048},
            url = {https://pirsa.org/08070048},
            author = {Frolov, Andrei},
            keywords = {Cosmology},
            language = {en},
            title = {Simulating the Big Bang},
            publisher = {Perimeter Institute},
            year = {2008},
            month = {jul},
            note = {PIRSA:08070048 see, \url{https://pirsa.org}}
          }

Andrei Frolov Simon Fraser University (SFU)

DOI 10.48660/08070048
Collection
Talk Type Scientific Series
Subject

Abstract

At the end of inflation, dynamical instability can rapidly deposit the energy of homogeneous cold inflation into excitations of other fields. This process (known as preheating) essentially starts the hot big bang as we know it. I will present simulations of several preheating models using a new numerical solver DEFROST I developed. The results trace the evolution of the fields, which quickly become very inhomogeneous as the instability kicks in. Surprisingly, there appears to be a certain universality across preheating models with different decay channels. After initial transient, the field density distributions quickly become stationary and lognormal to high precision. I will discuss possible connection of this observation to scalar field turbulence.