Triangle Seminars
Wednesday, 22 Jun 2022
Hydrodynamization, asymptotics and the early to late time interpolation in relativistic hydrodynamics
📍 London
Ines Varela Aniceto
(University of Southampton )
Abstract:
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.
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.
Posted by: andrea
Spacetime, Quantum Mechanics and Scattering Amplitudes
📍 London
Nima Arkani-Hamed
(IAS)
Abstract:
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
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
Posted by: QMW
Thursday, 23 Jun 2022
Description:
There is a deep connection between the topological defects that arise in diverse models of mathematical physics and recent generalisations of symmetry. In this short meeting we want to bring together researches working with higher categorical structures and those whose research involves defects and generalised symmetries in quantum field theories or lattice models, in order to present new results and explore new connections.
The meeting is supported by the LMS and the Institute of Physics.
There is a deep connection between the topological defects that arise in diverse models of mathematical physics and recent generalisations of symmetry. In this short meeting we want to bring together researches working with higher categorical structures and those whose research involves defects and generalised symmetries in quantum field theories or lattice models, in order to present new results and explore new connections.
The meeting is supported by the LMS and the Institute of Physics.
Posted by: Gerard Watts