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Vortex Formation by Merging of Multiple Trapped Bose-Einstein Condensates David R. Scherer, Chad N. Weiler, Tyler W. Neely, and Brian P. Anderson
 

Summary: Vortex Formation by Merging of Multiple Trapped Bose-Einstein Condensates
David R. Scherer, Chad N. Weiler, Tyler W. Neely, and Brian P. Anderson
College of Optical Sciences, University of Arizona, Tucson, Arizona 85721, USA
(Received 5 October 2006; published 12 March 2007)
We report observations of vortex formation by merging and interfering multiple 87
Rb Bose-Einstein
condensates (BECs) in a confining potential. In this experiment, a single harmonic potential well is
partitioned into three sections by a barrier, enabling the simultaneous formation of three independent,
uncorrelated BECs. The BECs may either automatically merge together during their growth, or for high-
energy barriers, the BECs can be merged together by barrier removal after their formation. Either process
may instigate vortex formation in the resulting BEC, depending on the initially indeterminate relative
phases of the condensates and the merging rate.
DOI: 10.1103/PhysRevLett.98.110402 PACS numbers: 03.75.Lm, 03.75.Kk, 67.40.Vs
In superfluids, long-range quantum phase coherence
regulates the formation and dynamics of quantized vortices
[1,2]. In a dilute-gas Bose-Einstein condensate (BEC), for
example, vortices can be created using direct manipulation
of the quantum phase profile of the BEC [3,4]. Vortices
in BECs have also been created using methods more
analogous to those of classical fluids [5], namely, through

  

Source: Anderson, Brian P. - Optical Sciences Center, University of Arizona

 

Collections: Physics