Dresden 2017 – wissenschaftliches Programm

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DY: Fachverband Dynamik und Statistische Physik

DY 6: Many-Body Quantum Systems (joint session DY/TT)

DY 6.8: Vortrag

Montag, 20. März 2017, 12:00–12:15, ZEU 118

Dynamics of correlations in strongly interacting systems at finite temperatures — •Friedemann Queisser¹, Konstantin Krutitsky¹, Patrick Navez², and Ralf Schützhold¹ — ¹Fakultät für Physik, Universität Duisburg-Essen, Lotharstraße, Duisburg 47048, Germany — ²Department of Physics, University of Crete, 71003 Heraklion, Greece

We discuss equilibrium and non-equilibrium properties of the Bose-Hubbard model in the formal limit of large coordination numbers Z [1]. Via an expansion of the correlation functions in powers of 1/Z we establish a hierarchy of correlations which facilitates the analysis of the system in equilibrium and in non-equilibrium. With this method we study the quantum dynamics (starting in a thermal state) after a quantum quench in the Mott (or normal gas) phase. The spread of correlations leads to an effective light-cone structure which depends sensitively on the initial thermal distribution [2].

[1] P. Navez and R. Schützhold, Phys. Rev. A 82, 063603 (2010)

[2] K. V. Krutitsky, P. Navez, F. Queisser and R. Schützhold, EPJ Quantum Technology 1 (2014)