Direct observation of coherent inter-orbital spin-exchange dynamics

Abstract

We report on the first direct observation of fast spin-exchange coherent oscillations between different long-lived electronic orbitals of ultracold ${}^{173}$Yb fermions. We measure, in a model-independent way, the strength of the exchange interaction driving this coherent process. This observation allows us to retrieve important information on the inter-orbital collisional properties of ${}^{173}$Yb atoms and paves the way to novel quantum simulations of paradigmatic models of two-orbital quantum magnetism.

arXiv commentIn this version of the preprint we have swapped the assignment of the eg+ and eg- states to the spectroscopic signals, thus correcting a wrong attribution in the previous version. As a consequence, the scattering lengths of the two states have been inverted. Hovewer, the main results of the paper remain unchanged. 5 pages (paper) + 3 pages (Supplemental Material)

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• Cold bosonic atoms in optical lattices
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• A one-dimensional liquid of fermions with tunable spin
• Controlled exchange interaction between pairs of neutral atoms in an optical lattice
• An SU(N) Mott insulator of an atomic Fermi gas realized by large-spin Pomeranchuk cooling
• Fermionization of two distinguishable fermions
• Self-consistent model of ultracold atomic collisions and Feshbach resonances in tight harmonic traps
• Optical Lattice Induced Light Shifts in an Yb Atomic Clock
• Coherent collisional spin dynamics in optical lattices
• Possibility of an ultra-precise optical clock using the $6^1{S}_0\to 6^3{P}_0^o$ transition in ${}^{171,173}$Yb atoms held in an optical lattice
• Coherent multi-flavour spin dynamics in a fermionic quantum gas
• Giant spin oscillations in an ultracold Fermi sea
• Heteronuclear molecules in an optical lattice: Theory and experiment
• Strongly Interacting Atoms and Molecules in a 3D Optical Lattice

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