Hamburg 2009 – wissenschaftliches Programm

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Q: Fachverband Quantenoptik und Photonik

Q 17: Quantengase: Bosonen Dynamik / Disorder

Q 17.1: Vortrag

Dienstag, 3. März 2009, 10:30–10:45, VMP 6 HS-A

Bose-Einstein condensates in time dependent rotating traps — •Endre Kajari, Daniela Denot, Reinhold Walser, and Wolfgang P. Schleich — Institut für Quantenphysik, Universität Ulm, D-89069 Ulm, Germany

Recent experiments on the time evolution of Bose-Einstein condensates in free fall, accomplished by the QUANTUS collaboration [1] at the drop tower facility in Bremen (ZARM), revealed a rotation of the harmonic trap at very small trapping frequencies. Since the scaling approach provided in the seminal articles [2,3] is not applicable to time dependent rotating traps, an extension of their formalism is necessary.

We recall a natural generalization [4] of their scaling approach, which allows for an efficient description of the macroscopic wave function in time dependent rotating traps. The limitations of this generalization are explored by comparison to three-dimensional numerical simulations of the time dependent Gross-Pitaevskii equation.
A. Vogel et al., Appl. Phys. B 84, 664 (2006).
Yu. Kagan et al., Phys. Rev. A. 54, R1753 (1996).
Y. Castin and R. Dum, Phys. Rev. Lett. 77, 5315 (1996).
P. Storey and M. Olshanii, Phys. Rev. A 62, 033604 (2000).