Motion of a Solitonic Vortex in the BEC-BCS Crossover
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We observe a long-lived solitary wave in a superfluid Fermi gas of [superscript 6]Li atoms after phase imprinting. Tomographic imaging reveals the excitation to be a solitonic vortex, oriented transverse to the long axis of the cigar-shaped atom cloud. The precessional motion of the vortex is directly observed, and its period is measured as a function of the chemical potential in the BEC-BCS crossover. The long period and the correspondingly large ratio of the inertial to the bare mass of the vortex are in good agreement with estimates based on superfluid hydrodynamics that we derive here using the known equation of state in the BEC-BCS crossover.
Date issued
2014-08Department
Massachusetts Institute of Technology. Department of Physics; MIT-Harvard Center for Ultracold AtomsJournal
Physical Review Letters
Publisher
American Physical Society
Citation
Ku, Mark J. H., et al. "Motion of a Solitonic Vortex in the BEC-BCS Crossover." Phys. Rev. Lett. 113, 065301 (August 2014). © 2014 American Physical Society
Version: Final published version
ISSN
0031-9007
1079-7114