Excitation spectrum of a Bose-Einstein condensate

J. Steinhauer*, R. Ozeri, N. Katz, N. Davidson

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

302 Scopus citations


A measurement of the static structure factor S(k) and the excitation spectrum ω(k) of a Bose-Einstein condensate (BEC), was presented. The excitation spectrum consisted of a linear phonon regime, as well as a single-particle regime and the linear regime provided an upper limit for the superfluid critical velocity, by the Landau criterion. The results showed that the excitation spectrum agreed quantitatively with the Bogoliubov spectrum, in the local density approximation.

Original languageAmerican English
Article number120407
Pages (from-to)1204071-1204074
Number of pages4
JournalPhysical Review Letters
Issue number12
StatePublished - 25 Mar 2002
Externally publishedYes


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