scholarly journals Discrete breather and soliton-mode collective excitations in Bose-Einstein condensates in a deep optical lattice with tunable three-body interactions

2015 ◽  
Vol 69 (4) ◽  
Author(s):  
Galal Ahmed Alakhaly ◽  
Bishwajyoti Dey
Keyword(s):  
Optical Lattice ◽  
Collective Excitations ◽  
Discrete Breather ◽  
Three Body ◽  
Bose Einstein

scholarly journals Collective Excitations of a Trapped Bose-Einstein Condensate in the Presence of a 1D Optical Lattice

2003 ◽  
Vol 90 (14) ◽  
Author(s):  
C. Fort ◽  
F. S. Cataliotti ◽  
L. Fallani ◽  
F. Ferlaino ◽  
P. Maddaloni ◽  
...  
Keyword(s):  
Optical Lattice ◽  
Einstein Condensate ◽  
Collective Excitations ◽  
Bose Einstein Condensate ◽  
Bose Einstein

Stability of binary condensates with spatial modulations of quintic nonlinearities in optical lattices

2015 ◽  
Vol 29 (03) ◽  
pp. 1550008 ◽  
Author(s):  
M. D. Mboumba ◽  
A. B. Moubissi ◽  
T. B. Ekogo ◽  
D. Belobo Belobo ◽  
G. H. Ben-Bolie ◽  
...  
Keyword(s):  
Optical Lattice ◽  
Optical Lattices ◽  
Mean Field ◽  
Collective Excitations ◽  
Pitaevskii Equation ◽  
Dependent Potential ◽  
The Mean ◽  
The Stability ◽  
Bose Einstein ◽  
Spatial Modulations

The stability and collective excitations of binary Bose–Einstein condensates with cubic and quintic nonlinearities in variable anharmonic optical lattices are investigated. By using the variational approach, the influences of the quintic nonlinearities and the shape of the external potential on the stability are discussed in details. It is found that the quintic intraspecies and interspecies interatomic interactions profoundly affect the stability criterion and collective excitations of the system. The shape dependent potential form that characterizes the optical lattice deeply alters the stability regions. Direct numerical simulations of the mean-field coupled Gross–Pitaevskii equation describing the system agree well with the analytical predictions.

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