Week 20.06.2022 – 26.06.2022

As part of the SAGEX Closing Meeting being held at Queen Mary's University of London in June 2022, we are delighted that world-renowned theoretical physicist, Professor Nima Arkani-Hamed will deliver the meeting's colloquium. We welcome undergraduate and postgraduate students, and researchers and academics to attend this exciting event. Please register at: https://www.eventbrite.co.uk/e/sagex-colloquium-nima-arkani-hamed-tickets-256058035477

Dissipative relativistic hydrodynamics is expected to describe the late times, thermalised behaviour of strongly coupled fluids such as a strongly coupled super Yang-Mills plasma. These systems are then accurately described by a hydrodynamic series expansion in small gradients. Surprisingly, this hydrodynamic expansion is accurate even when the systems are still quite anisotropic: the non-hydrodynamic modes governing the non-equilibrium behaviour at very early-times become exponentially close to the hydrodynamic solution in an early process called hydrodynamization. This early success is intimately related with the fact that the hydrodynamic expansion is asymptotic. The theory of transseries and resurgence explicitly shows how the non hydrodynamic modes are in fact encoded in this late-time expansion. In this talk we will focus on a MIS-type model and use exponentially accurate summations of the the late-time resurgent transseries to recover the behaviour of the fluid before hydrodynamisation, and effectively match it to any given initial non-equilibrium condition. We will further show that such summations can provide analytic predictions beyond the late time regime.