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

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:11 Nov 2024 10:22
    URI:https://strathprints.strath.ac.uk/id/eprint/43336
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