Vortex Precession in Bose-Einstein Condensates: Observations With Filled and Empty Cores
B P. Anderson, P C. Haljan, C E. Wieman, Eric A. Cornell
We have observed and characterized the dynamics of singly quantized vortices in dilute-gas Bose-Einstein condensates. Our condensates are produced in a superposition of two internal states of 87Rb, with one state supporting a vortex and the other filling the vortex core. Subsequently, the state filling the core can be partially or completely removed, reducing the radius of the core by as much as a factor of 13, all the way down to its bare value of the healing length. The corresponding superfluid rotation rates, evaluated at the core radius, vary by a factor of 150, but the precession frequency of the vortex core about the condensate axis changes by only a factor of 2.
Physical Review Letters
Bose-Einstein condensation, superfluidity, vortex
, Haljan, P.
, Wieman, C.
and Cornell, E.
Vortex Precession in Bose-Einstein Condensates: Observations With Filled and Empty Cores, Physical Review Letters
(Accessed November 28, 2023)