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

M. J. Mark, E. Haller, K. Lauber, J. G. Danzl, A. Janisch, H. P. Buechler, Andrew Daley, H. -C. Naegerl

Research output: Contribution to journalArticle

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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.

LanguageEnglish
Article number215302
Number of pages5
JournalPhysical Review Letters
Volume108
Issue number21
DOIs
Publication statusPublished - 25 May 2012

Fingerprint

insulators
preparation
spectroscopy
interactions
metastable state
occupation
atoms
magnetic resonance
retarding
modulation
life (durability)
probes
excitation
energy

Keywords

  • spectroscopy
  • Mott insulator
  • bosonic atoms

Cite this

Mark, M. J., Haller, E., Lauber, K., Danzl, J. G., Janisch, A., Buechler, H. P., ... Naegerl, H. -C. (2012). Preparation and spectroscopy of a metastable Mott-insulator state with attractive interactions. Physical Review Letters, 108(21), [215302]. https://doi.org/10.1103/PhysRevLett.108.215302
Mark, M. J. ; Haller, E. ; Lauber, K. ; Danzl, J. G. ; Janisch, A. ; Buechler, H. P. ; Daley, Andrew ; Naegerl, H. -C. / Preparation and spectroscopy of a metastable Mott-insulator state with attractive interactions. In: Physical Review Letters. 2012 ; Vol. 108, No. 21.
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Preparation and spectroscopy of a metastable Mott-insulator state with attractive interactions. / Mark, M. J.; Haller, E.; Lauber, K.; Danzl, J. G.; Janisch, A.; Buechler, H. P.; Daley, Andrew; Naegerl, H. -C.

In: Physical Review Letters, Vol. 108, No. 21, 215302, 25.05.2012.

Research output: Contribution to journalArticle

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AU - Mark, M. J.

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AU - Janisch, A.

AU - Buechler, H. P.

AU - Daley, Andrew

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