scholarly journals Modulation Instability of Two-Dimensional Dipolar Bose-Einstein Condensate in a Deep Optical Lattice

2009 ◽  
Vol 116 (4) ◽  
pp. 519-521 ◽  
Author(s):  
A. Wöllert ◽  
G. Gligorić ◽  
M.M. Škorić ◽  
A. Maluckov ◽  
N. Raičević ◽  
...  
Keyword(s):  
Optical Lattice ◽  
Modulation Instability ◽  
Einstein Condensate ◽  
Two Dimensional ◽  
Bose Einstein Condensate ◽  
Bose Einstein

EVOLUTION OF INTERFERENCE PATTERNS OF SUPERFLUID FERMI GASES RELEASED FROM A TWO-DIMENSIONAL OPTICAL LATTICE

2012 ◽  
Vol 26 (03) ◽  
pp. 1250017
Author(s):  
SUJUAN LIU ◽  
WEN WEN ◽  
GUOXIANG HUANG
Keyword(s):  
Interference Pattern ◽  
Optical Lattice ◽  
Initial Distribution ◽  
Einstein Condensate ◽  
Main Peak ◽  
Two Dimensional ◽  
Bose Einstein Condensate ◽  
Propagator Method ◽  
Bose Einstein ◽  
Superfluid Fermi

We study interference patterns and their time evolution of a superfluid fermionic gas released from a two-dimensional (2D) optical lattice below and above Feshbach resonance. We calculate initial distribution of many subcondensates formed in a combined potential of a parabolic trap and a 2D optical lattice in the crossover from Bardeen–Cooper–Schrieffer (BCS) superfluid to a Bose–Einstein condensate (BEC). By using Feynman propagator method combined with numerical simulations we investigate the interference patterns of the subcondensates for two different cases. One is when both the parabolic trap and optical lattice are switched off. In this case, interference pattern displays a main peak and many secondary peaks. The distance between these interference peaks grows as time increases. The other one is when only the 2D optical lattice is switched off. The interference pattern in this case is found to display decay and revival, and such behavior repeats periodically with increasing time. In different regimes of the BCS-BEC crossover, coherent arrays of interference patterns show different features, which can be used to characterize experimentally different properties in different superfluid regimes of the BCS–BEC crossover.

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