Quantum depletion of a homogeneous Bose-Einstein condensate

Abstract

We have measured the quantum depletion of an interacting homogeneous Bose-Einstein condensate, and confirmed the 70-year old theory of N.N. Bogoliubov. The observed condensate depletion is reversibly tuneable 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 probed by coherent two-photon Bragg scattering.

arXiv commentMain text: 4 pages, 3 figures; Supplemental information: 2 pages, 4 figures

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