Hamburg 2009 – wissenschaftliches Programm

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Q: Fachverband Quantenoptik und Photonik

Q 56: Poster IV

Q 56.5: Poster

Donnerstag, 5. März 2009, 16:30–19:00, VMP 9 Poster

Fractional photon-assisted tunneling for Bose-Einstein condensates in a double well — Niklas Teichmann, •Martin Esmann, and Christoph Weiss — Institut für Physik, Carl von Ossietzky Universität, D-26111 Oldenburg, Germany

Half-integer photon-resonance in a periodically shaken double well are investigated on the level of the N-particle quantum dynamics. Contrary to non-linear mean-field equations, the linear N-particle Schrödinger equation does not contain any non-linearity which could be the origin of such resonances. Nevertheless, analytic calculations on the N-particle level explain why such resonances can be observed even for particle numbers as low as N=2. These calculations also demonstrate why fractional photon resonances are not restricted to half-integer values.