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Collective Excitations of a Bose-Einstein Condensate in a Dilute Gas

D. S. Jin

Joint Institute for Laboratory Astrophysics, University of Colorado, Boulder, Colorado 80309-0440, USA

National Institute of Standards and Technology, 100 Bureau Drive, Stop 1070, Gaithersburg, MD 20899-1070, USA

Physics Department, University of Colorado, Boulder, Colorado 80309-0440, USA

Quantum Physics Division, National Institute of Standards and Technology.

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J. R. Ensher

Joint Institute for Laboratory Astrophysics, University of Colorado, Boulder, Colorado 80309-0440, USA

National Institute of Standards and Technology, 100 Bureau Drive, Stop 1070, Gaithersburg, MD 20899-1070, USA

Physics Department, University of Colorado, Boulder, Colorado 80309-0440, USA

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M. R. Matthews

Joint Institute for Laboratory Astrophysics, University of Colorado, Boulder, Colorado 80309-0440, USA

National Institute of Standards and Technology, 100 Bureau Drive, Stop 1070, Gaithersburg, MD 20899-1070, USA

Physics Department, University of Colorado, Boulder, Colorado 80309-0440, USA

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C. E. Wieman

Joint Institute for Laboratory Astrophysics, University of Colorado, Boulder, Colorado 80309-0440, USA

National Institute of Standards and Technology, 100 Bureau Drive, Stop 1070, Gaithersburg, MD 20899-1070, USA

Physics Department, University of Colorado, Boulder, Colorado 80309-0440, USA

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E. A. Cornell

Joint Institute for Laboratory Astrophysics, University of Colorado, Boulder, Colorado 80309-0440, USA

National Institute of Standards and Technology, 100 Bureau Drive, Stop 1070, Gaithersburg, MD 20899-1070, USA

Physics Department, University of Colorado, Boulder, Colorado 80309-0440, USA

Quantum Physics Division, National Institute of Standards and Technology.

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https://doi.org/10.1142/9789812813787_0063Cited by:0 (Source: Crossref)

Abstract:

We observe phononlike excitations of a Bose-Einstein condensate (BEC) in a dilute atomic gas. ⁸⁷Rb atoms are optically trapped and precooled, loaded into a magnetic trap, and then evaporatively cooled through the BEC phase transition to form a condensate. We excite the condensate by applying an inhomogeneous oscillatory force with adjustable frequency and symmetry. We have observed modes with different angular momenta and different energies and have studied how their characteristics depend on interaction energy. We find that the condensate excitations persist longer than their counterparts in uncondensed clouds. [S0031-9007(96)00722-3]

PACS: 03.75.Fi, 05.30.Jp, 32.80.Pj

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Collective Excitations of a Bose-Einstein Condensate in a Dilute Gas

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