Dark-dark solitons and modulational instability in miscible two-component Bose-Einstein condensates

Journal Article · Sat Oct 15 00:00:00 EDT 2011 · Physical Review. A

DOI:https://doi.org/10.1103/PHYSREVA.84.041605· OSTI ID:22080304

Hoefer, M A ^[1]; Chang, J J; Hamner, C; Engels, P ^[2]

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1. North Carolina State University, Department of Mathematics, Raleigh, North Carolina 27695 (United States)
2. Washington State University, Department of Physics and Astronomy, Pullman, Washington 99164 (United States)

We investigate the dynamics of two miscible superfluids experiencing fast counterflow in a narrow channel. The superfluids are formed by two distinguishable components of a trapped dilute-gas Bose-Einstein condensate (BEC). The onset of counterflow-induced modulational instability throughout the cloud is observed and shown to lead to the proliferation of dark-dark vector solitons. These solitons do not exist in single-component systems, exhibit intriguing beating dynamics, and can experience a transverse instability leading to vortex line structures. Experimental results and multidimensional numerical simulations are presented.

• OSTI ID: 22080304
• Journal Information: Physical Review. A, Vol. 84, Issue 4; Other Information: (c) 2011 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 1050-2947
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
BOSE-EINSTEIN CONDENSATION
COMPUTERIZED SIMULATION
INSTABILITY
SOLITONS
SUPERFLUIDITY
VORTICES