作者
Simone Donadello, Simone Serafini, Marek Tylutki, Lev P Pitaevskii, Franco Dalfovo, Giacomo Lamporesi, Gabriele Ferrari
发表日期
2014/8/4
期刊
Physical review letters
卷号
113
期号
6
页码范围
065302
出版商
American Physical Society
简介
We observe solitonic vortices in an atomic Bose-Einstein condensate (BEC) after free expansion. Clear signatures of the nature of such defects are the twisted planar density depletion around the vortex line, observed in absorption images, and the double dislocation in the interference pattern obtained through homodyne techniques. Both methods allow us to determine the sign of the quantized circulation. Experimental observations agree with numerical simulations. These solitonic vortices are the decay product of phase defects of the BEC order parameter spontaneously created after a rapid quench across the BEC transition in a cigar-shaped harmonic trap and are shown to have a very long lifetime.
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S Donadello, S Serafini, M Tylutki, LP Pitaevskii… - Physical review letters, 2014