Dresden 2011 – wissenschaftliches Programm

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A: Fachverband Atomphysik

A 26: Poster III

A 26.62: Poster

Donnerstag, 17. März 2011, 16:00–18:30, P2

Excitation dynamics of bosons with driven interaction in harmonic trap — •Ioannis Brouzos and Peter Schmelcher — ZOQ Hamburg

We investigate the excitation properties of finite bosonic systems in a one-dimensional harmonic trap with time-dependent interaction. Periodically oscillating driving of the interparticle interaction strength induces excitations of relative motion of the many-body state with particular and controlable contributions of momentarily excited states, and mechanisms for quantum acceleration in the case of resonances occur. For the case of the relative coordinate sytem of two particles, we show the main excitation mechanisms, the role of driving frequency and strength and initial correlation of the bosonic state are discussed, while the Floquet spectrum is calculated revealing the acceleration modes. This simple case is used then for the bottom-up understanding of cases with higher particle numbers, and offers the possibility to design excitations of the many-body state exclusively in the relative motion.