Darmstadt 2008 – wissenschaftliches Programm
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A: Fachverband Atomphysik
A 26: Posters: BECs, ultracold gases and plasmas
A 26.6: Poster
Donnerstag, 13. März 2008, 16:30–18:30, Poster C3
Dynamics of a Spinor-BEC in a radio-frequency-dressed magnetic trap — •Stephan Middelkamp1, Igor Lesanovsky2, and Peter Schmelcher1,3 — 1Theoretische Chemie, Physikalisch-Chemisches Institut, Universität Heidelberg, INF 229, 69120 Heidelberg, Germany — 2Institut für Theoretische Physik, Universität Innsbruck, Technikerstraße 25, A-6020 Innsbruck, Austria — 3Physikalisches Institut, Universität Heidelberg, Philosophenweg 12, 69120 Heidelberg, Germany
We theoretically investigate the dynamics of a quasi-one-dimensional F=1 Spinor Bose-Einstein Condensates in a magnetic trap. Due to the coupling of the trap to the magnetic quantum number the mF=1 and mF=−1 components experience inverse trapping potentials, whereas the mF=0 component experiences no trapping potential at all. We have chosen a double well as trapping potential for the mF=1 component. Consequently, the mF=−1 component experiences a local potential minimum at the barrier of the double well potential and potential maxima at the position of the wells. In each well resides a BEC of atoms in the mF=1 state and at the barrier a BEC of atoms in the mF=−1 state. With microwaves one can excite the atoms in the mF=−1 state to the mF=0 state. Thus eliminating effects of the magnetic trap. Nevertheless, the m=0 component remains trapped due to the interaction with the atoms in the mF=1 state. The strength of this interaction can be tuned by changing the number of atoms in the mF=1 state.