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journal id: "physicalxreviewxletters"
| Authors | M.O. Mewes, M.R. Andrews, N.J. van Druten, D.M. Kurn, D.S. Durfee, C.G. Townsend, W. Ketterle | | Title | Collective excitations of a Bose-Einstein condensate in a magnetic trap |
| Journal | Physical review letters |
| Volume | 77 |
| Year | 1996 |
| Issue | 6 |
| Pages | 988-991 |
| ISSN | 10797114 |
| Faculty | Faculty of Science |
| Institute/dept. | FNWI: Van der Waals-Zeeman Institute (WZI) |
| Keywords | Bose-Einstein condensate; Magnetic trap |
| Abstract | Collective excitations of a dilute Bose condensate have been observed. These excitations are analogous to phonons in superfluid helium. Bose condensates were created by evaporatively cooling magnetically trapped sodium atoms. Excitations were induced by a modulation of the trapping potential, and detected as shape oscillations in the freely expanding condensates. The frequencies of the lowest modes agreed well with theoretical predictions based on mean-field theory. Before the onset of Bose-Einstein condensation, we observed sound waves in a dense ultracold gas. |
| Note | (c)2000 American Physical Society |
| Document type | Article |
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