Quantum Depletion of a Homogeneous Bose-Einstein Condensate

We measure the quantum depletion of an interacting homogeneous Bose-Einstein condensate and confirm the 70-year-old theory of Bogoliubov. The observed condensate depletion is reversibly tunable by changing the strength of the interparticle interactions. Our atomic homogeneous condensate is produced...

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Bibliographic Details
Published in:Physical review letters 2017-11, Vol.119 (19), p.190404-190404, Article 190404
Main Authors: Lopes, Raphael, Eigen, Christoph, Navon, Nir, Clément, David, Smith, Robert P, Hadzibabic, Zoran
Format: Article
Language:English
Subjects:
Atomic Physics
Condensed Matter
Physics
Quantum Physics
Soft Condensed Matter
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Summary:We measure the quantum depletion of an interacting homogeneous Bose-Einstein condensate and confirm the 70-year-old theory of Bogoliubov. The observed condensate depletion is reversibly tunable by changing the strength of the interparticle interactions. Our atomic homogeneous condensate is produced in an optical-box trap, the interactions are tuned via a magnetic Feshbach resonance, and the condensed fraction is determined by momentum-selective two-photon Bragg scattering.
ISSN:0031-9007
1079-7114
DOI:10.1103/physrevlett.119.190404