Bretin V, Rosenbusch P, Chevy F, Shlyapnikov G V, Dalibard J
Laboratoire Kastler Brossel, 24 rue Lhomond, 75005 Paris, France.
Phys Rev Lett. 2003 Mar 14;90(10):100403. doi: 10.1103/PhysRevLett.90.100403. Epub 2003 Mar 12.
We study the two transverse quadrupole modes of a cigar-shaped Bose-Einstein condensate with a single centered vortex. We show that the counterrotating mode is more strongly damped than in the absence of a vortex, whereas the corotating mode is not affected appreciably by the vortex. We interpret this result as a decay of the counterrotating quadrupole mode into two excitations of the vortex line, the so-called Kelvin modes. This is supported by direct observation of the vortex line.
我们研究了具有单个中心涡旋的雪茄形玻色-爱因斯坦凝聚体的两种横向四极模式。我们表明，反向旋转模式比没有涡旋时的阻尼更强，而同向旋转模式受涡旋的影响不明显。我们将这一结果解释为反向旋转四极模式衰变为涡旋线的两种激发，即所谓的开尔文模式。这一观点得到了对涡旋线的直接观测的支持。
