Physics – Condensed Matter – Other Condensed Matter
Scientific paper
2008-03-28
Physics
Condensed Matter
Other Condensed Matter
8 pages, 8 figures, submitted to PRA
Scientific paper
We study the macroscopic quantum self-trapping effect in a mixture of Bose-Einstein condensate and a large number of quantum degenerate fermions, trapped in a double-well potential with a variable separation between the wells. The large number of fermions localized in each well form quasi-static impurities that affect the dynamics of the bosonic cloud. Our semi-analytical analysis based on a mean-field model shows that main features of macroscopic quantum self trapping in a pure bosonic system are radically modified by the influence of fermions, with both the onset of self-trapping and properties of the self-trapped state depending on the fermion concentration as well as on the type of inter-species interaction. Remarkably, repulsive inter-species interaction leads to population inversion of the bosonic energy levels in the trapping potential and hence to the inversion of symmetry of the macroscopic wavefunction. Realistic physical estimates are given based on experimental parameters for a $^{40}$K-$^{87}$Rb system.
Caballero Benitez S. F.
Gulacsi Miklos
Kivshar Yu. S.
Ostrovskaya Elena A.
No associations
LandOfFree
Macroscopic quantum self-trapping in a Bose-Josephson junction with fermions does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Macroscopic quantum self-trapping in a Bose-Josephson junction with fermions, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Macroscopic quantum self-trapping in a Bose-Josephson junction with fermions will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-173667