Stuttgart 2012 – wissenschaftliches Programm

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Q: Fachverband Quantenoptik und Photonik

Q 14: Quantengase: Bosonen 2

Q 14.5: Vortrag

Montag, 12. März 2012, 17:30–17:45, V47.02

Non-equilibrium transport in open Bose-Hubbard chains — •Georgios Kordas^1,2, Andreas Komnik¹, Alexandros Karanikas², and Sandro Wimberger¹ — ¹Institute for Theoretical Physics, University of Heidelberg, Philosophenweg 19, D-69120 Heidelberg — ²Nuclear & Particle Physics Section, Physics Department, University of Athens, Panepistimiopolis Ilissia, GR-15771 Athens

We investigate the non-equilibrium transport properties of bosons in an open Bose-Hubbard chain coupled to two bosonic reservoirs. In order to study the dynamics of the system we introduce a Master equation in Lindblad form. We use a mean-field approximation to solve this equation for weakly interacting bosons. For strong interactions in the chain, we go beyond the mean-field description. Finally, we discuss the validity of our approach as compared to other non-equilibrium formalisms.