Την Τετάρτη 24 Ιανουαρίου στις 14:00 στην αίθουσα σεμιναρίων του Σπουδαστηρίου (4ος όροφος), ο Δαμιανός Ιωσηφίδης (University of Tartu) θα δώσει σεμινάριο.

Η ομιλία θα πραγματοποιηθεί μέσω Zoom:
https://cern.zoom.us/j/8676738663?pwd=azZ4NzJ2T0tlWE9saHBEQklvWXRLQT09   

Ακολουθούν ο τίτλος και η περίληψη της ομιλίας.

Title: Hyperhydrodynamics: Imperfect Fluids Emerging from Hypermomentum

Abstract: We explore a new action formulation of hyperfluids, fluids with intrinsic hypermomentum. Brown’s Lagrangian for a relativistic perfect fluid is generalised by incorporating the degrees of freedom encoded in the hypermomentum tensor, namely by including connection-matter couplings. Quite interestingly, generic hyperfluids are imperfect, since hypermomentum induces such effects as bulk and shear viscosities as well as heat fluxes. The various coefficients that appear in the first order expansion of hydrodynamics can now be deduced from a Lagrangian formulation, given a geometrical interpretation and a suggested microscopic description in terms of hypermomentum. This connection between hypermomentum and dissipative fluids could shed new light on the physics of relativistic hydrodynamics. The applicability of the new formalism is demonstrated by exact cosmological solutions.

Υπενθυμίζουμε ότι τα παρελθοντικά σεμινάρια καθώς και τα αρχεία αυτών μπορούν να βρεθούν στην ακόλουθη ιστοσελίδα:
http://quantum-theory.physics.auth.gr/seminaria-akadimaikou-etous-2023-24/