Dissipation and vortex creation in Bose-Einstein condensed gases

Physical Review A - Atomic, Molecular, and Optical Physics

Volumn 61, Issue 5, 2000, Pages 516031-516034

  Jackson, B ^a   McCann, J F ^b   Adams, C S ^a  

^a DURHAM UNIVERSITY   (United Kingdom)

^b QUEEN'S UNIVERSITY BELFAST   (United Kingdom)

Author keywords

[No Author keywords available]

Indexed keywords

EID: 0346481057     PISSN: 10502947     EISSN: None     Source Type: Journal    
DOI: None     Document Type: Article

References (20)

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13. B. M. Caradoc-Davies, R. J. Ballagh, and K. Burnett, Phys. Rev. Lett. 83, 895 (1999). This work simulated vortex formation when angular momentum is transferred to the condensate by stirring. No dependence of the critical velocity on the speed of sound was found. However, in this case single vortices appear at the edge and are drawn into the bulk by the potential, rather than in [11] where pairs are formed in the object. This suggests that different mechanisms are responsible in each case.
14. sat are the atomic lifetime and saturation intensity, respectively, while P and Δ are the laser power and detuning.
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16. Note that, in general, the requirement that vortex pairs are formed "at a point" follows from Kelvin's theorem, in order to conserve circulation within an arbitrary closed loop. For infinite potentials [8,10], vortex pairs are nucleated at the surface on opposite sides of the object, so that the circulation within a loop intersecting the surface is not conserved. However, this loop is not closed, as fluid particles cannot enter into the object. Hence, Kelvin's theorem is not violated in this case.
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19. 5. Such simulations require large grid sizes, making them computationally intensive.
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