We review some recent developments in mathematical aspects of relativistic fluids. The goal
is to provide a quick entry point to some research topics of current interest that is accessible …

We present the first generalization of Navier-Stokes theory to relativity that satisfies all of the
following properties:(a) the system coupled to Einstein's equations is causal and strongly …

Heavy-ion collisions at small beam energies have the potential to reveal the rich phase
structure of QCD at low temperature and nonzero density. In this case spatially modulated …

The study of quantum many-body physics in Liouvillian open quantum systems becomes
increasingly important with the recent progress in experimental control on dissipative …

We consider the possibility that the Milky Way's dark matter halo possesses a non-vanishing
equation of state. Consequently, we evaluate the contribution due to the speed of sound …

This thesis is concerned with the investigation of late-time large-scale cosmic structure
formation by applying non-perturbative functional methods to a field-theoretic description of …

Ultra-large scales close to the cosmological horizon will be probed by the upcoming
observational campaigns. They hold the promise to constrain single-field inflation as well as …