Low-Energy Collective Excitation of Bose-Einstein Condensates in an Anisotropic Magnetic Trap

• 来源期刊: 中国物理快报（英文版）
• 年，卷（期）: 2009,（7）
• 页码范围: 244-247
• 页数: 4页
• 语种: 英文

摘要

We experimentally investigate the collective excitation of 87Rb Bose-Einstein condensates confined in a cigarshaped magnetic trap (QUIC trap).Using a method of magnetic perturbation,the center-of-mass oscillation of the condensate is excited, so that the radial trapping frequency of the QUIc trap can be precisely determined.A high-order excitation,characterized by a fast shape oscillation,also occurs simultaneously,with a noticeable damping in the oscillation ampfitude compared with the oscillation of the center ofmass.The measured oscillation frequencies,associated with these two low-energy exeiration modes.agree well with theoretical predictions based on the Gross-Pitaevskii equation.