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arXiv · 1409.1099

Feshbach resonances, molecular bound states and prospects of ultracold molecule formation in mixtures of ultracold K and Cs

Hannah J. Patel·Caroline L. Blackley·Simon L. Cornish·Jeremy M. Hutson
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Abstract

We consider the possibilities for producing ultracold mixtures of K and Cs and forming KCs molecules by magnetoassociation. We carry out coupled-channel calculations of the interspecies scattering length for $^{39}$KCs, $^{41}$KCs and $^{40}$KCs and characterize Feshbach resonances due to s-wave and d-wave bound states, with widths ranging from below 1 nG to 5 G. We also calculate the corresponding bound-state energies as a function of magnetic field. We give a general discussion of the combinations of intraspecies and interspecies scattering lengths needed to form low-temperature atomic mixtures and condensates and identify promising strategies for cooling and molecule formation for all three isotopic combinations of K and Cs.

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Hannah J. Patel, Caroline L. Blackley, Simon L. Cornish, Jeremy M. Hutson. 2014-09-03. Feshbach resonances, molecular bound states and prospects of ultracold molecule formation in mixtures of ultracold K and Cs. https://doi.org/10.1103/physreva.90.032716

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