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Q: Quantenoptik und Photonik

Q 2: Poster Quantengase

Q 2.9: Poster

Freitag, 4. März 2005, 11:00–12:30, Poster HU

Resonance scattering of atoms on a two-component BEC — •Michael Grupp, Reinhold Walser, Gerrit Nandi, and Wolfgang P. Schleich — Abteilung für Quantenphysik, Universität Ulm, Germany

In this contribution we investigate the scattering properties of identical particles on a Bose-Einstein condensate (BEC) [1,2] with two internal states, trapped in a one-dimensional potential of finite depth. We calculate the phase shifts by determining the Boguliubov excitation spectrum and study in-elastic scattering processes. Our special interest is the investigation of discrete states embedded in the continuum. Here, a phenomenon analogous to Fano and Feshbach resonances [3,4] occurs.

[1] U. V. Poulsen and K. Mølmer, Phys. Rev. A 67, 013610 (2003).

[2] J. Brand, I. Häring, and J.-M. Rost, Phys. Rev. Lett. 91, 070403 (2003).

[3] U. Fano, Phys. Rev. 124, 1866 (1961).

[4] H. Feshbach, Ann. Phys. 19, 287 (1962).