Experimental realization of a Rydberg optical Feshbach resonance in a quantum many-body system

O. Thomas, C. Lippe, T. Eichert and H. Ott ()
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O. Thomas: Technische Universität Kaiserslautern
C. Lippe: Technische Universität Kaiserslautern
T. Eichert: Technische Universität Kaiserslautern
H. Ott: Technische Universität Kaiserslautern

Nature Communications, 2018, vol. 9, issue 1, 1-6

Abstract: Abstract Feshbach resonances are a powerful tool to tune the interaction in an ultracold atomic gas. The commonly used magnetic Feshbach resonances are specific for each species and are restricted with respect to their temporal and spatial modulation. Optical Feshbach resonances are an alternative which can overcome this limitation. Here, we show that ultra-long-range Rydberg molecules can be used to implement an optical Feshbach resonance. Tuning the on-site interaction of a degenerate Bose gas in a 3D optical lattice, we demonstrate a similar performance compared to recent realizations of optical Feshbach resonances using intercombination transitions. Our results open up a class of optical Feshbach resonances with a plenitude of available lines for many atomic species and the possibility to further increase the performance by carefully selecting the underlying Rydberg state.

Date: 2018
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DOI: 10.1038/s41467-018-04684-w

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