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Zoekopdracht: journal id: "physicalxreviewxletters"

AuteursM.O. Mewes, M.R. Andrews, N.J. van Druten, D.M. Kurn, D.S. Durfee, C.G. Townsend, W. Ketterle
TitelCollective excitations of a Bose-Einstein condensate in a magnetic trap
TijdschriftPhysical review letters
Jaargang77
Jaar1996
Nummer6
Pagina's988-991
ISSN10797114
FaculteitFaculteit der Natuurwetenschappen, Wiskunde en Informatica
Instituut/afd.FNWI: Van der Waals-Zeeman Institute (WZI)
TrefwoordenBose-Einstein condensate; Magnetic trap
SamenvattingCollective 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.
Opmerkingen(c)2000 American Physical Society
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