Surface Excitations in a Bose-Einstein Condensate

TL;DR

This paper investigates surface excitations in a sodium Bose-Einstein condensate, demonstrating the excitation of various modes using a novel optical dipole force technique, which enhances the study of vortices and rotation in condensates.

Contribution

It introduces a flexible optical method for exciting surface modes in Bose-Einstein condensates, enabling detailed studies of rotating states and vortices.

Findings

Observed standing and rotating quadrupolar and octopolar modes

Developed a high-resolution excitation technique using a scanning laser beam

The method is applicable to studying vortices in condensates

Abstract

Surface modes in a Bose-Einstein condensate of sodium atoms have been studied. We observed excitations of standing and rotating quadrupolar and octopolar modes. The modes were excited with high spatial and temporal resolution using the optical dipole force of a rapidly scanning laser beam. This novel technique is very flexible and should be useful for the study of rotating Bose-Einstein condensates and vortices.