Quantum depletion of a homogeneous Bose-Einstein condensate

Christoph Eigen; David Cl\'ement; Nir Navon; Raphael Lopes; Robert P. Smith; Zoran Hadzibabic

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Quantum depletion of a homogeneous Bose-Einstein condensate

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arxiv 1706.01867 v1 pith:NJRJDBTF submitted 2017-06-06 cond-mat.quant-gas physics.atom-phquant-ph

Raphael Lopes , Christoph Eigen , Nir Navon , David Clément , Robert P. Smith , Zoran Hadzibabic This is my paper

classification cond-mat.quant-gasphysics.atom-phquant-ph

keywords condensatedepletionhomogeneousbose-einsteininteractionsquantumatomicbogoliubov

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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.

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