2000/05/31 by Jian-Ming Tang
Physics and Astronomy · #cond-mat
paper · pdf · doi:10.1023/a:1017516706057
published as J. Low Temp. Phys. 121, 285 (2000) · LaTeX (JLTP style), 6 pages, 2 EPS figures, Procceding of International Symposium on Quantum Fluids and Solids 2000
arxiv created 2000/07/27 · arxiv updated 2009/11/30
The structure of a quantized vortex in a Bose-Einstein Condensate is investigated using the projection method developed by Peierls, Yoccoz, and Thouless. This method was invented to describe the collective motion of a many-body system beyond the mean-field approximation. The quantum fluctuation has been properly built into the variational wave function, and a vortex is described by a linear combination of Feynman wave functions weighted by a Gaussian distribution in their positions. In contrast to the solution of the Gross-Pitaevskii equation, the particle density is finite at the vortex axis and the vorticity is distributed in the core region.