Experimental studies of equilibrium vortex properties in a Bose-condensed gas

Details Experimental studies of equilibrium vortex properties in a Bose-condensed gas Experimental studies of equilibrium vortex properties in a Bose-condensed gas

2004-05-12

arxiv.org/abs/cond-mat/0405240v4

Physics

Condensed Matter

Soft Condensed Matter

Fixed minor notational inconsistencies in figures. 12 pages, 8 figures

Scientific paper

10.1103/PhysRevA.70.063607

We characterize several equilibrium vortex effects in a rotating Bose-Einstein condensate. Specifically we attempt precision measurements of vortex lattice spacing and the vortex core size over a range of condensate densities and rotation rates. These measurements are supplemented by numerical simulations, and both experimental and numerical data are compared to theory predictions of Sheehy and Radzihovsky [17] (cond-mat/0402637) and Baym and Pethick [25] (cond-mat/0308325). Finally, we study the effect of the centrifugal weakening of the trapping spring constants on the critical temperature for quantum degeneracy and the effects of finite temperature on vortex contrast.

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