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Feshbach spectroscopy of a K-Rb atomic mixture

Francesca Ferlaino·Chiara D'Errico·Giacomo Roati·Matteo Zaccanti·Massimo Inguscio·Giovanni Modugno·Andrea Simoni
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Abstract

We perform extensive magnetic Feshbach spectroscopy of an ultracold mixture of fermionic 40K and bosonic 87Rb atoms. The magnetic-field locations of 14 interspecies resonances is used to construct a quantum collision model able to predict accurate collisional parameters for all K-Rb isotopic pairs. In particular we determine the interspecies s-wave singlet and triplet scattering lengths for the 40K-87Rb mixture as -111 +/- 5 Bohr and -215 +/- 10 Bohr respectively. We also predict accurate scattering lengths and position of Feshbach resonances for the other K-Rb isotopic pairs. We discuss the consequences of our results for current and future experiments with ultracold K-Rb mixtures.

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Francesca Ferlaino, Chiara D'Errico, Giacomo Roati, Matteo Zaccanti, Massimo Inguscio, Giovanni Modugno, Andrea Simoni. 2006-10-07. Feshbach spectroscopy of a K-Rb atomic mixture. https://doi.org/10.1103/physreva.73.040702

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