Vortex oscillations in confined Bose-Einstein condensate interacting with 1D optical lattice

TL;DR

This paper investigates vortex oscillations in a confined Bose-Einstein condensate with an optical lattice, revealing collective excitations and proposing experimental observation methods.

Contribution

It introduces the excitation spectra of vortex oscillation modes in a combined harmonic and optical lattice potential, highlighting their localized nature and experimental accessibility.

Findings

Identification of collective vortex oscillation modes

Characteristic wavelength of localized vortex oscillations

Proposed experimental excitation method

Abstract

We study Bose-Einstein condensate of atomic Boson gases trapped in a composite potential of a harmonic potential and an optical lattice potential. We found a series of collective excitations that induces localized vortex oscillations with a characteristic wavelength. The oscillations might be observed experimentally when radial confinement is tight. We present the excitation spectra of the vortex oscillation modes and propose a way to experimentally excite the modes.