Hysteresis effects in rotating Bose-Einstein condensates

Journal Article · Sun Oct 15 00:00:00 EDT 2006 · Physical Review. A

DOI:https://doi.org/10.1103/PHYSREVA.74.043618· OSTI ID:20863959

Jackson, B ^[1]; Barenghi, C F ^[2]

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1. Dipartimento di Fisica, Universita di Trento and CNR-INFM R and D Center on Bose-Einstein Condensation, I-38050 Povo (Italy)
2. School of Mathematics and Statistics, University of Newcastle upon Tyne, NE1 7RU (United Kingdom)

We study the formation of vortices in a dilute Bose-Einstein condensate confined in a rotating anisotropic trap. We find that the number of vortices and angular momentum attained by the condensate depend upon the rotation history of the trap and on the number of vortices present in the condensate initially. A simplified model based on hydrodynamic equations is developed, and used to explain this effect in terms of a shift in the resonance frequency of the quadrupole mode of the condensate in the presence of a vortex lattice. Differences between the spin-up and spin-down response of the condensate are found, demonstrating hysteresis phenomena in this system.

• OSTI ID: 20863959
• Journal Information: Physical Review. A, Vol. 74, Issue 4; Other Information: DOI: 10.1103/PhysRevA.74.043618; (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
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ANISOTROPY
BOSE-EINSTEIN CONDENSATION
HYDRODYNAMICS
HYSTERESIS
QUADRUPOLES
RESONANCE
ROTATION
SPIN
TRAPS
VORTICES