Modulation instability and solitary-wave formation in two-component Bose-Einstein condensates

Journal Article · Sat Jul 15 00:00:00 EDT 2006 · Physical Review. A

DOI:https://doi.org/10.1103/PHYSREVA.74.013617· OSTI ID:20852957

Kasamatsu, Kenichi ^[1]; Tsubota, Makoto ^[2]

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1. Department of General Education, Ishikawa National College of Technology, Tsubata, Ishikawa 929-0392 (Japan)
2. Department of Physics, Osaka City University, Sumiyoshi-Ku, Osaka 558-8585 (Japan)

We investigate nonlinear dynamics induced by the modulation instability of a two-component mixture in an atomic Bose-Einstein condensate. The nonlinear dynamics is examined using numerical simulations of the time-dependent coupled Gross-Pitaevskii equations. The unstable modulation grows from initially miscible condensates into various types of vector solitary waves, depending on the combinations of the sign of the coupling constants (intracomponent and intercomponent). We discuss the detailed features of the modulation instability, dynamics of solitary wave formation, and an analogy with the collapsing dynamics in a single-component condensate with attractive interactions.

• OSTI ID: 20852957
• Journal Information: Physical Review. A, Vol. 74, Issue 1; Other Information: DOI: 10.1103/PhysRevA.74.013617; (c) 2006 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 1050-2947
• Country of Publication: United States
• Language: English

Related Subjects

74 ATOMIC AND MOLECULAR PHYSICS
BOSE-EINSTEIN CONDENSATION
COMPUTERIZED SIMULATION
COUPLING CONSTANTS
INSTABILITY
MIXTURES
MODULATION
NONLINEAR PROBLEMS
SOLITONS
TIME DEPENDENCE
VECTORS
WAVE EQUATIONS