Observation of Strong Quantum Depletion in a Gaseous Bose-Einstein Condensate

ORAL

Abstract

We studied quantum depletion in a gaseous Bose-Einstein condensate. An optical lattice enhanced the atomic interactions and modified the dispersion relation resulting in strong quantum depletion. The depleted fraction was directly observed as a diffuse background in the time-of-flight images. Bogoliubov theory provided a semi-quantitative description for our observations of depleted fractions in excess of $50\%$.

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Authors

  • Yingmei Liu

  • Kaiwen Xu

  • Daniel Miller

  • JitKee Chin

  • Widagdo Setiawan

  • Wolfgang Ketterle

    MIT, MIT-Harvard Center for Ultracold Atoms, Research Laboratory of Electronics, MIT, Dept. of Physics, MIT, Massachusetts Institute of Technology