Quantized vortices in a rotating Bose-Einstein condensate with spatiotemporally modulated interaction

TL;DR

This paper theoretically and numerically investigates quantized vortices in a rotating Bose-Einstein condensate with spatiotemporally modulated interactions, revealing new stable vortex states including those with large topological charges.

Contribution

It introduces explicit solutions for vortex states in modulated interaction systems and analyzes their stability, expanding understanding of vortex dynamics in BECs.

Findings

Existence of stable vortex states with large topological charges.

Identification of new stable vortex states supported by modulated interactions.

Proposal of an experimental protocol to observe these vortices.

Abstract

We present theoretical analysis and numerical studies of the quantized vortices in a rotating Bose-Einstein condensate with spatiotemporally modulated interaction in harmonic and anharmonic potentials, respectively. The exact quantized vortex and giant vortex solutions are constructed explicitly by similarity transformation. Their stability behavior has been examined by numerical simulation, which shows that a new series of stable vortex states (defined by radial and angular quantum numbers) can be supported by the spatiotemporally modulated interaction in this system. We find that there exist stable quantized vortices with large topological charges in repulsive condensates with spatiotemporally modulated interaction. We also give an experimental protocol to observe these vortex states in future experiments.