Formation of a Dilute Bose-Einstein Condensate

Brian K. Jackson, J F McCann, Charles S. Adams

We solve the time-dependent Gross-Pitaevskii in 2D to simulate the flow of an object through a dilute Bose-Einstein condensate trapped in a harmonic well. We demonstrate vortex formation and study the process in terms of the accumulation of phase slip and the evolution of the fluid velocity.

MJ Davis, TM Wright, T Gasenzer +2 more

R. Lacaze, Pierre Lallemand, Yves Pomeau A +1 more

T. Winiecki, Jackson, B., McCann, Jim +1 more

Above a critical velocity, the dominant mechanism of energy transfer between a moving object and a dilute Bose-Einstein condensate is vortex formation. In this paper, we discuss the critical velocity for vortex formation and the link between vortex shedding and drag in both homogeneous and inhomogeneous condensates. We find that at supersonic velocities sound radiation also contributes significantly to the drag force.

Ian Jauslin

T Winiecki, B Jackson, J F McCann +1 more

Above a critical velocity, the dominant mechanism of energy transfer between a moving object and a dilute Bose-Einstein condensate is vortex formation. In this paper, we discuss the critical velocity for vortex formation and the link between vortex shedding and drag in both homogeneous and inhomogeneous condensates. We find that at supersonic velocities sound radiation also contributes significantly to the drag force.