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Strongly Interacting Atoms and Molecules in a 3D Optical Lattice

Michael Köhl·Kenneth Günter·Thilo Stöferle·Henning Moritz·Tilman Esslinger
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Abstract

We report on the realization of a strongly interacting quantum degenerate gas of fermionic atoms in a three-dimensional optical lattice. We prepare a band-insulating state for a two-component Fermi gas with one atom per spin state per lattice site. Using a Feshbach resonance, we induce strong interactions between the atoms. When sweeping the magnetic field from the repulsive side towards the attractive side of the Feshbach resonance we induce a coupling between Bloch bands leading to a transfer of atoms from the lowest band into higher bands. Sweeping the magnetic field across the Feshbach resonance from the attractive towards the repulsive side leads to two-particle bound states and ultimately to the formation of molecules. From the fraction of formed molecules we determine the temperature of the atoms in the lattice.

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Michael Köhl, Kenneth Günter, Thilo Stöferle, Henning Moritz, Tilman Esslinger. 2006-05-03. Strongly Interacting Atoms and Molecules in a 3D Optical Lattice. https://doi.org/10.1088/0953-4075%2F39%2F10%2Fs05

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