Quantum Depletion of a Homogeneous Bose-Einstein Condensate
Raphael LopesCavendish Laboratory, University of Cambridge, J.J. Thomson Avenue, Cambridge CB3 0HE, United KingdomChristoph EigenCavendish Laboratory, University of Cambridge, J.J. Thomson Avenue, Cambridge CB3 0HE, United KingdomNir NavonCavendish Laboratory, University of Cambridge, J.J. Thomson Avenue, Cambridge CB3 0HE, United KingdomDavid ClémentLaboratoire Charles Fabry, Institut d'Optique Graduate School, CNRS, Université Paris-Saclay, 91127 Palaiseau cedex, FranceRobert P. SmithCavendish Laboratory, University of Cambridge, J.J. Thomson Avenue, Cambridge CB3 0HE, United KingdomZoran HadzibabicCavendish Laboratory, University of Cambridge, J.J. Thomson Avenue, Cambridge CB3 0HE, United Kingdom
2017en
ABI
Annotatsiya
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.
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