Preparation and spectroscopy of a metastable Mott-insulator state with attractive interactions

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Mark, M. J. and Haller, E. and Lauber, K. and Danzl, J. G. and Janisch, A. and Buechler, H. P. and Daley, Andrew and Naegerl, H. -C. (2012) Preparation and spectroscopy of a metastable Mott-insulator state with attractive interactions. Physical Review Letters, 108 (21). 215302. ISSN 1079-7114 (https://doi.org/10.1103/PhysRevLett.108.215302)

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Abstract

We prepare and study a metastable attractive Mott-insulator state formed with bosonic atoms in a three-dimensional optical lattice. Starting from a Mott insulator with Cs atoms at weak repulsive interactions, we use a magnetic Feshbach resonance to tune the interactions to large attractive values and produce a metastable state pinned by attractive interactions with a lifetime on the order of 10 s. We probe the (de) excitation spectrum via lattice modulation spectroscopy, measuring the interaction dependence of two-and three-body bound-state energies. As a result of increased on-site three-body loss we observe resonance broadening and suppression of tunneling processes that produce three-body occupation.

ORCID iDs

Mark, M. J., Haller, E. ORCID logoORCID: https://orcid.org/0000-0002-7951-1721, Lauber, K., Danzl, J. G., Janisch, A., Buechler, H. P., Daley, Andrew ORCID logoORCID: https://orcid.org/0000-0001-9005-7761 and Naegerl, H. -C.;
  • Item type:Article
    ID code:43336
    Dates:
    Date
    Event
    25 May 2012
    Published
    Subjects:Science > Physics
    Department:Faculty of Science > Physics
    Depositing user: Pure Administrator
    Date deposited:26 Mar 2013 10:48
    Last modified:15 Dec 2024 13:41
    URI:https://strathprints.strath.ac.uk/id/eprint/43336
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