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TT: Fachverband Tiefe Temperaturen
TT 96: Correlated Electrons: Nonequilibrium Quantum Many-Body Systems II
TT 96.4: Talk
Thursday, April 3, 2014, 15:45–16:00, HSZ 304
Out of equilibrium quantum criticality and real-time dynamics — •Pedro Ribeiro1,2,3, Farzaneh Zamani1,2, and Stefan Kirchner1,2 — 1CFIF-IST, Universidade de Lisboa, Lisboa, Portugal. — 2MPI-PKS, Dresden, Germany — 3MPI-CPfS, Dresden, Germany,
A systematic understanding of the physical properties of correlated systems away from thermal equilibrium is currently actively pursued in a broad variety of contexts. This interest in the theoretical description of far-from-equilibrium dynamics is fueled by recent experimental achievements to probe non-thermal states in a controlled fashion. In this talk we report on recent progress in the understanding of real time evolution of certain impurity models near local critical quantum points away from thermal equilibrium. The reported results are based on a generalisation of the dynamic large-N approach to the Keldysh contour that can be used to efficiently obtain the full real-time dynamics. Particular attention is given to the approach to previously found steady-state solutions when the system is quenched near criticality.