Hamburg 2009 – scientific programme

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Q: Fachverband Quantenoptik und Photonik

Q 56: Poster IV

Q 56.1: Poster

Thursday, March 5, 2009, 16:30–19:00, VMP 9 Poster

Collective modes in a simple many body system with quantum chaos — •Martin P. Strzys and James R. Anglin — Technische Universität Kaiserslautern, Germany

Bose-Einstein condensates in two weakly coupled double well potentials can be described by a four-mode Bose-Hubbard Hamiltonian. This system can also be realized by two weakly coupled two-component spinor condensates. The classical mean-field dynamics of such a system is not integrable and thus in general chaotic. This genuine chaotic behaviour gives rise to signatures of chaos in the full quantum system often called quantum chaos. Our investigations try to illuminate the relation between collective excitations, correlations and quatum chaos in this few-mode quantum system and shall show the way towards the emergence of thermodynamics in mesoscopic systems.