Pulsating and Persistent Vector Solitons in a Bose-Einstein Condensate in a Lattice upon Phase Separation Instability

Journal Article · Fri Nov 06 00:00:00 EST 2009 · Physical Review Letters

DOI:https://doi.org/10.1103/PHYSREVLETT.103.190401· OSTI ID:21370801

Shrestha, Uttam; Javanainen, Juha ^[1]; Ruostekoski, Janne ^[2]

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1. Department of Physics, University of Connecticut, Storrs, Connecticut 06269-3046 (United States)
2. School of Mathematics, University of Southampton, Southampton, SO17 1BJ (United Kingdom)

We study numerically the outcome of the phase separation instability of a dual-species Bose-Einstein condensate in an optical lattice. When only one excitation mode is unstable a bound pair of bright and dark solitonlike structures periodically appears and disappears, whereas for more than one unstable mode a persistent soliton-antisoliton pair develops. The oscillating soliton represents a regime where the two-species condensate neither remains phase-separated nor is dynamically stable.

• OSTI ID: 21370801
• Journal Information: Physical Review Letters, Vol. 103, Issue 19; Other Information: DOI: 10.1103/PhysRevLett.103.190401; (c) 2009 The American Physical Society; ISSN 0031-9007
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
BOSE-EINSTEIN CONDENSATION
CONDENSATES
EXCITATION
INSTABILITY
PERIODICITY
SOLITONS
VECTORS
ENERGY-LEVEL TRANSITIONS
QUASI PARTICLES
TENSORS
VARIATIONS