Bright solitons in Bose-Fermi mixtures

Journal Article · Mon May 15 04:00:00 EDT 2006 · Physical Review. A

DOI:https://doi.org/10.1103/PHYSREVA.73.0· OSTI ID:20787283

Karpiuk, Tomasz; Brewczyk, Miroslaw ^[1]; RzaPewski, Kazimierz ^[2]

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1. Instytut Fizyki Teoretycznej, Uniwersytet w Bialymstoku, ulica Lipowa 41, 15-424 Bialystok (Poland)
2. Centrum Fizyki Teoretycznej PAN, Aleja Lotnikow 32/46, 02-668 Warsaw (Poland)

We consider the formation of bright solitons in a mixture of Bose and Fermi degenerate gases confined in a three-dimensional elongated harmonic trap. The Bose and Fermi atoms are assumed to effectively attract each other whereas bosonic atoms repel each other. Strong enough attraction between bosonic and fermionic components can change the character of the interaction within the bosonic cloud from repulsive to attractive making thus possible the generation of bright solitons in the mixture. On the other hand, such structures might be in danger due to the collapse phenomenon existing in attractive gases. We show, however, that under some conditions (defined by the strength of the Bose-Fermi components attraction) the structures which neither spread nor collapse can be generated. For elongated enough traps the formation of solitons is possible even at the 'natural' value of the mutual Bose-Fermi ({sup 87}Rb-{sup 40}K in our case) scattering length.

• OSTI ID: 20787283
• Journal Information: Physical Review. A, Journal Name: Physical Review. A Journal Issue: 5 Vol. 73; ISSN 1050-2947; ISSN PLRAAN
• Country of Publication: United States
• Language: English

Related Subjects

74 ATOMIC AND MOLECULAR PHYSICS
ATOMS
BOSE-EINSTEIN CONDENSATION
BOSE-EINSTEIN GAS
FERMI GAS
FERMIONS
MIXTURES
POTASSIUM 40
RADIATION PRESSURE
RUBIDIUM 87
SCATTERING LENGTHS
SOLITONS
TRAPS