Symbiotic gap and semigap solitons in Bose-Einstein condensates

Journal Article · Fri Feb 15 04:00:00 EST 2008 · Physical Review. A

DOI:https://doi.org/10.1103/PHYSREVA.77.023607· OSTI ID:21140528

Adhikari, Sadhan K ^[1]; Malomed, Boris A ^[2]

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1. Instituto de Fisica Teorica, UNESP-Sao Paulo State University, 01.405-900 Sao Paulo, Sao Paulo (Brazil)
2. Department of Physical Electronics, School of Electrical Engineering, Tel Aviv University, Tel Aviv 69978 (Israel)

Using the variational approximation and numerical simulations, we study one-dimensional gap solitons in a binary Bose-Einstein condensate trapped in an optical-lattice potential. We consider the case of interspecies repulsion, while the intraspecies interaction may be either repulsive or attractive. Several types of gap solitons are found: symmetric or asymmetric; unsplit or split, if centers of the components coincide or separate; intragap (with both chemical potentials falling into a single band gap) or intergap, otherwise. In the case of the intraspecies attraction, a smooth transition takes place between solitons in the semi-infinite gap, those in the first finite band gap, and semigap solitons (with one component in a band gap and the other in the semi-infinite gap)

• OSTI ID: 21140528
• Journal Information: Physical Review. A, Journal Name: Physical Review. A Journal Issue: 2 Vol. 77; ISSN 1050-2947; ISSN PLRAAN
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
APPROXIMATIONS
ASYMMETRY
BOSE-EINSTEIN CONDENSATION
INTERACTIONS
ONE-DIMENSIONAL CALCULATIONS
POTENTIALS
SIMULATION
SOLITONS
TRAPPING
VARIATIONAL METHODS