Precision measurements on a tunable Mott insulator of ultracold atoms

M.J. Mark, Elmar Haller, K. Lauber, J.G. Danzl, Andrew Daley, H.-C. Nägerl

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Abstract

We perform precision measurements on a Mott-insulator quantum state of ultracold atoms with tunable interactions. We probe the dependence of the superfluid-to-Mott-insulator transition on the interaction strength and explore the limits of the standard Bose-Hubbard model description. By tuning the on-site interaction energies to values comparable to the interband separation, we are able to quantitatively measure number-dependent shifts in the excitation spectrum caused by effective multibody interactions.
Original languageEnglish
Article number175301
Number of pages5
JournalPhysical Review Letters
Volume107
Issue number17
DOIs
Publication statusPublished - 18 Oct 2011

Keywords

  • Mott insulator
  • ultracold atoms
  • precision measurements

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