86 citations · 297 across the 15 of their papers we have counts for
16 papers
Time evolution of observables out of thermal equilibrium
Herbert Nachbagauer
We propose a new approximation-technique to deal with the exact macroscopic integro-differential evolution equations of statistical systems which self-consistently accounts for dis…
Dissipative Time Evolution of Observables in Non-equilibrium Statistical Quantum Systems
Herbert Nachbagauer
We discuss differential-- versus integral--equation based methods describing out--of thermal equilibrium systems and emphasize the importance of a well defined reduction to statist…
Wigner Functionals and their Dynamics in Quantum-Field-Theory
Herbert Nachbagauer
We reformulate time evolution of systems in mixed states in terms of the classical observables of correlators using the Weyl correspondence rule. The resulting equation of motion f…
The Quantum Liouville Equation for the Effective Action
Herbert Nachbagauer
Starting from the von Neumann equation, we construct the quantum evolution equation for the effective action for systems in mixed states. This allows us to find the hierarchy of eq…
The dynamics of cosmological perturbations in thermal theory
Herbert Nachbagauer, Anton K. Rebhan, Dominik J. Schwarz
Using a recent thermal-field-theory approach to cosmological perturbations, the exact solutions that were found for collisionless ultrarelativistic matter are generalized to includ…
The dynamics of a thermal non-equilibrium anharmonic oscillator
Herbert Nachbagauer
We propose an non-standard method to calculate non-equilibrium physical observables. Considering the generic example of an anharmonic quantum oscillator, we take advantage of the f…