High sensitivity phonon spectroscopy of bose-einstein condensates using matter-wave interference

N. Katz*, R. Ozeri, J. Steinhauer, N. Davidson, C. Tozzo, F. Dalfovo

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

18 Scopus citations


The low-momentum excitations of a Bose-Einstein condensate (BEC), using a novel matter-wave interference technique, was studied. The dynamics of phonons in freely expanding condensates was analyzed using both the Gross-Pitaevskii equation (GPE) and a dynamically rescaled Bogoliubov theory. It was found that axial low-momentum phonons were adiabatically converted by the expansion into free atoms with the same axial momentum. A strong matter-wave fringe patterns was observed in time-of-flight expansion images. It was shown that the fringe visibility was a sensitive spectroscopic probe of in-trap phonons, explained by use of Bogoliubov excitation projection method applied to the rescaled order parameter of the expanding condensate.

Original languageAmerican English
Article number220403
JournalPhysical Review Letters
Issue number22
StatePublished - 29 Nov 2004
Externally publishedYes

Bibliographical note

Funding Information:
This work was supported in part by the Israel Ministry of Science, the Israel Science Foundation, and the DIP Foundation.


Dive into the research topics of 'High sensitivity phonon spectroscopy of bose-einstein condensates using matter-wave interference'. Together they form a unique fingerprint.

Cite this