2017/06/06 by Raphael Lopes, Christoph Eigen, Nir Navon +3 · 1 citation
Physics and Astronomy · #cond-mat.quant-gas #physics.atom-ph #quant-ph
paper · pdf · doi:10.1103/physrevlett.119.190404
published as Phys. Rev. Lett. 119, 190404 (2017) · Main text: 4 pages, 3 figures; Supplemental information: 2 pages, 4 figures
arxiv created 2017/06/06 · arxiv updated 2017/12/12
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.