Seminar

From Field Theory to the Hydrodynamics of Relativistic Superfluids

By
Stephan Stetina (Vienna University of Technology)
Date
Place
Aula 507
seminar ICCUB
The hydrodynamic description of a superfluid is usually based on a two-fluid picture. In this Seminar, I will demonstrate how basic properties of a relativistic two-fluid system can be derived from the underlying microscopic physics of a quantum field theory. To obtain analytic results of all non-dissipative hydrodynamic quantities in terms of field theoretic variables, calculations are first carried out in a low-temperature and weak-coupling approximation. In a second step, the 2-particle-irreducible formalism is applied: This formalism allows for a numerical evaluation of the hydrodynamic parameters for all temperatures below the critical temperature. The relevance of these studies for astrophysics and in particular the physics of compact stars will be discussed.