Preparation and spectroscopy of a metastable Mott insulator state with attractive interactions
Quantum Gases
2012-06-04 v1 Quantum Physics
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 seconds. 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.
Keywords
Cite
@article{arxiv.1201.1008,
title = {Preparation and spectroscopy of a metastable Mott insulator state with attractive interactions},
author = {Manfred J. Mark and Elmar Haller and Katharina Lauber and Johann G. Danzl and Alexander Janisch and Hans Peter Büchler and Andrew J. Daley and Hanns-Christoph Nägerl},
journal= {arXiv preprint arXiv:1201.1008},
year = {2012}
}
Comments
7 pages, 6 figures