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.
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Ruban, V.P. Direct and Reverse Precession of a Massive Vortex in a Binary Bose–Einstein Condensate. Jetp Lett. 115, 415–421 (2022). https://doi.org/10.1134/S0021364022100290
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DOI: https://doi.org/10.1134/S0021364022100290