Journal
PHYSICAL REVIEW LETTERS
Volume 113, Issue 6, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.113.065301
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Funding
- NSF
- ARO MURI on Atomtronics
- AFOSR PECASE
- ONR
- Army Research Office
- David and Lucile Packard Foundation
- DARPA OLE program
- Direct For Mathematical & Physical Scien
- Division Of Physics [0969311] Funding Source: National Science Foundation
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We observe a long-lived solitary wave in a superfluid Fermi gas of Li-6 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.
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