Generating and manipulating quantized vortices on-demand in a Bose-Einstein condensate: A numerical study
- Univ. of Massachusetts, Amherst, MA (United States); Univ. of Oldenburg (Germany)
- Univ. of Massachusetts, Amherst, MA (United States); Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
- San Diego State Univ., CA (United States)
- Univ. of Arizona, Tucson, AZ (United States)
Here, we numerically investigate an experimentally viable method for generating and manipulating on-demand several vortices in a highly oblate atomic Bose-Einstein condensate (BEC) in order to initialize complex vortex distributions for studies of vortex dynamics. The method utilizes moving laser beams to generate, capture, and transport vortices inside and outside the BEC. This methodology is examined in detail and shows a wide parameter range of applicability for the prototypical two-vortex case, as well as case examples of producing and manipulating several vortices for which there is no net circulation, corresponding to equal numbers of positive and negative circulation vortices, and cases for which there is one net quantum of circulation. We also find that the presence of dissipation can help stabilize the pinning of the vortices on their respective laser beam pinning sites. Finally, we illustrate how to utilize laser beams as repositories that hold large numbers of vortices and how to deposit individual vortices in a sequential fashion in the repositories in order to construct superfluid flows about the repository beams with several quanta of circulation.
- Research Organization:
- Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
- Sponsoring Organization:
- USDOE
- Grant/Contract Number:
- 605096; DMS-1312856; PHY-1205713; 2010239; INST 184/108-1 FUGG; AC52-06NA25396
- OSTI ID:
- 1258158
- Report Number(s):
- LA-UR-15-26191; PLRAAN
- Journal Information:
- Physical Review A, Vol. 93, Issue 2; ISSN 2469-9926
- Publisher:
- American Physical Society (APS)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
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