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Instabilities of a vortex-ring-bright soliton in trapped binary three-dimensional Bose-Einstein condensates

Journal Article · · Physical Review A
 [1];  [2];  [3];  [4]
  1. Landau Inst. for Theoretical Physics, Moscow Region (Russia)
  2. Sichuan Univ., Chengdu (China)
  3. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
  4. Univ. of Massachusetts, Amherst, MA (United States)

Instabilities of vortex-ring-bright coherent structures in harmonically trapped two-component three-dimensional Bose-Einstein condensates are studied numerically within the coupled Gross-Pitaevskii equations and interpreted analytically. Interestingly, the filled vortex core with a sufficiently large amount of the bright component is observed to reduce the parametric interval of stability of the vortex ring. Here, we have identified the mechanisms of several linear instabilities and one nonlinear parametric instability in this connection. Two of the linear instabilities are qualitatively different from ones reported earlier and are associated with azimuthal modes of m = 0 and m = 1, i.e., deviations of the vortex from the stationary ring shape. Our nonlinear parametric resonance instability occurs between the m = 0 and m = 2 modes and signals the exchange of energy between them.

Research Organization:
Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
Sponsoring Organization:
USDOE
Grant/Contract Number:
89233218CNA000001
OSTI ID:
1869612
Report Number(s):
LA-UR-21-29171
Journal Information:
Physical Review A, Journal Name: Physical Review A Journal Issue: 1 Vol. 105; ISSN 2469-9926
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English

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