Low-Energy Collective Excitation of Bose-Einstein Condensates in an Anisotropic Magnetic Trap
YANG Lu1,2, WANG Xiao-Rui1,2, LI Ke1,2, TAN Xin-Zhou1,2, XIONG Hong-Wei1, LU Bao-Long1
1State key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, Wuhan Institute of Physics and Mathematics, Chinese Academy of Sciences, Wuhan 4300712Graduate School, Chinese Academy of Sciences, Beijing 100049
Low-Energy Collective Excitation of Bose-Einstein Condensates in an Anisotropic Magnetic Trap
YANG Lu1,2, WANG Xiao-Rui1,2, LI Ke1,2, TAN Xin-Zhou1,2, XIONG Hong-Wei1, LU Bao-Long1
1State key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, Wuhan Institute of Physics and Mathematics, Chinese Academy of Sciences, Wuhan 4300712Graduate School, Chinese Academy of Sciences, Beijing 100049
摘要We experimentally investigate the collective excitation of 87Rb Bose-Einstein condensates confined in a cigar-shaped 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 amplitude compared with the oscillation of the center of mass. The measured oscillation frequencies, associated with these two low-energy excitation modes, agree well with theoretical predictions based on the Gross-Pitaevskii equation.
Abstract：We experimentally investigate the collective excitation of 87Rb Bose-Einstein condensates confined in a cigar-shaped 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 amplitude compared with the oscillation of the center of mass. The measured oscillation frequencies, associated with these two low-energy excitation modes, agree well with theoretical predictions based on the Gross-Pitaevskii equation.
YANG Lu;WANG Xiao-Rui;LI Ke;TAN Xin-Zhou;XIONG Hong-Wei;LU Bao-Long. Low-Energy Collective Excitation of Bose-Einstein Condensates in an Anisotropic Magnetic Trap[J]. 中国物理快报, 2009, 26(7): 76701-076701.
YANG Lu, WANG Xiao-Rui, LI Ke, TAN Xin-Zhou, XIONG Hong-Wei, LU Bao-Long. Low-Energy Collective Excitation of Bose-Einstein Condensates in an Anisotropic Magnetic Trap. Chin. Phys. Lett., 2009, 26(7): 76701-076701.
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2009, Vol. 26 
