| CONDENSED MATTER: STRUCTURE, MECHANICAL AND THERMAL PROPERTIES |
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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 |
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| Cite this article: |
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YANG Lu, WANG Xiao-Rui, LI Ke et al 2009 Chin. Phys. Lett. 26 076701 |
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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.
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| Keywords:
67.85.De
67.85.-d
03.75.Kk
03.75.Nt
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Received: 13 April 2009
Published: 02 July 2009
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| PACS: |
67.85.De
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(Dynamic properties of condensates; excitations, and superfluid flow)
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67.85.-d
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(Ultracold gases, trapped gases)
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03.75.Kk
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(Dynamic properties of condensates; collective and hydrodynamic excitations, superfluid flow)
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03.75.Nt
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(Other Bose-Einstein condensation phenomena)
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[1] Pethick C J and Smith H 2002 Bose--EinsteinCondensation in Dilute Gases (Cambridge: Cambridge University)chap 7 p 165
[2] Jin D S, Ensher J R, Matthews M R, Wieman C E and CornellE A 1996 Phys. Rev. Lett. 77 420
[3] Ketterle W, Durfee D S. and Stamper-Kurn D M 1998 Making, Robing and Understanding Bose--Einstien Condensates(Varenna: International School of Physics) p 43
[4] Stringari S 1996 Phys. Rev. Lett. 77 2360
[5] Esslinger T, Bloch I and H\"{ansch T W 1998 Phys.Rev. A 58 R2664
[6] Mewes M O, Andrews M R, van Druten N J, Kurn D M, Durfee DS, Townsend C G and Ketterle W 1996 Phys. Rev. Lett. 77988
[7] Jin D S, Matthews M R, Ensher J R, Wieman C E and CornellE A 1997 Phys. Rev. Lett. 78 764
[8] Dalfovo F and Giorgini S 1999 Rev. Mod. Phys. 71 463
[9] Andrews M R, Kurn D M, Miesner H J, Durfee D S, TownsendC. G, Inouye S and Ketterle W 1997 Phys. Rev. Lett. 79553
[10] Chevy F, Bretin V, Rosenbusch P, Madison K W and DalibardJ 2002 Phys. Rev. Lett. 88 250402
[11] Ghosh T K 2000 Phys. Rev. A 63 013603
[12] Fedichev P O, Shlyapnikov G V and Walraven J T M 1998 Phys. Rev. Lett. 80 2269
[13] Marag\`{o O M, Hopkins S A, Arlt J, Hodby E,Hechenblaikner G and Foot C J 2000 Phys. Rev. Lett. 842056
[14] Onofrio R, Durfee D S, Raman C, K\"{ohl M, Kuklewicz C Eand Ketterle W 2000 Phys. Rev. Lett. 84 810
[15] Mewes M O, Andrews M R, van Druten N J, Kurn D M, DurfeeD S and Ketterle W 1996 Phys. Rev. Lett. 77 416
[16] Giorgini S 2000 Phys. Rev. A 61 063615
[17] Jackson B and Adams C S 2001 Phys. Rev. A 63053606 |
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