The dynamics of a filled massive vortex is studied numerically and analytically using a two-dimensional model of a two-component Bose-Einstein condensate trapped in a harmonic trap. This condensate exhibits phase separation. In the framework of the coupled Gross-Pitaevskii equations, it is demonstrated that, in a certain range of parameters of the nonlinear interaction, the precession of a sufficiently massive vortex around the center is strongly slowed down and even reverses its direction with a further increase in the mass. An approximate ordinary differential equation is derived that makes it possible to explain this behavior of the system.
Soviet Journal of Experimental and Theoretical Physics Letters
- Pub Date:
- April 2022
- Condensed Matter - Quantum Gases;
- Nonlinear Sciences - Pattern Formation and Solitons
- 6 pages, 4 figures, to appear as [JETP Letters, 2022, Vol. 115, No. 7, pp. 415-421]