Berlin 2005 – wissenschaftliches Programm
Bereiche | Tage | Auswahl | Suche | Downloads | Hilfe
Q: Quantenoptik und Photonik
Q 41: Quantengase II
Q 41.1: Vortrag
Dienstag, 8. März 2005, 15:00–15:15, HU Kinosaal
Transport of Bose-Einstein condensates through disorderd potentials — •Tobias Paul1, Peter Schlagheck1, Patricio Leboeuf2, and Nicolas Pavloff2 — 1Institut für theoretische Physik, Universität Regensburg, Germany — 2Laboratoire de Physique Théorique et Modèles Statistiques, Université Paris Sud, France
Recent atom-chip experiments have revealed that the surface roughness in the chip wires induces significant disorder in the magnetic potential, which may lead to the fragmentation of the condensate [1,2]. This raises the question how disorder influences the transport of Bose-Einstein condensates through mesoscopic waveguides. We investigate this problem by a time-dependent wave packet propagation approach as well as by calculating stationary scattering states in presence of a disordered potential. The scaling of the transmission with the atom-atom interaction strength as well as with the spatial length of the disorderd region is discussed. Furthermore we investigate how a weak disorder in the waveguide affects the resonant transport of a Bose-Einstein condensate through a symmetric double barrier potential [3].
[1] J.Fortágh et al., Phys. Rev. A 66, 041604(R) (2003)
[2] T.Schumm et al., physics/0407094 (2004)
[3] T. Paul, K. Richter and P. Schlagheck, cond-mat/0407488 (2004)