Dresden 2011 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 55: Transport and Localization of interacting Bosons 2
Q 55.4: Vortrag
Donnerstag, 17. März 2011, 15:15–15:30, BAR Schön
Weak (anti-)localization of Bose-Einstein condensates in two-dimensional chaotic cavities: numerical results — •Timo Hartmann1, Juan Diego Urbina1, Klaus Richter1, and Peter Schlagheck2 — 1Institute for Theoretical Physics, University of Regensburg, D-93040 Regensburg, Germany — 2Département de Physique, Université de Liège, 4000 Liège, Belgium
The possibility to induce artificial magnetic gauge potentials
for matter waves [1] and to create almost arbitrarily shaped
confinement potentials [2] makes it now interesting and feasible to study coherent
transport of Bose-Einstein condensates through various mesoscopic structures.
Previous theoretical studies have focused on the question how
coherent backscattering in disordered potentials
is modified by the presence of the atom-atom interaction [3].
We now study the analogous scenario of weak localisation in
ballistic billiard geometries which exhibit chaotic classical dynamics.
To this end we numerically investigate the quasi-stationary propagation of a
condensate through such structures within the mean-field
approximation.
The transmission is measured as a function of the magnetic gauge field and of the non-linearity.
With increasing non-linearity an inversion of the weak-localisation peak is visible
and its origin will be discussed.
Y.-J. Lin et al., Phys. Rev. Lett. 102 130401 (2009)
K. Henderson et al., New J. Phys. 11, 043030(2009)
M. Hartung et al., Phys. Rev. Lett. 101, 020603 (2008).