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 $^{39}\mathrm{KCs}$ , $^{41}\mathrm{KCs}$ , and $^{40}\mathrm{KCs}$ 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.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 $^{39}\mathrm{KCs}$, $^{41}\mathrm{KCs}$, and $^{40}\mathrm{KCs}$ 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.

arXiv:1409.1099Physical Review ASep 25, 201424 citations

Resonant Association of Feshbach Molecules

Thomas M. Hanna, Thorsten K ohler, Keith R. Burnett

Bulletin of the American Physical SocietyJun 8, 20070 citations

Formation of a Bose condensate of stable molecules via a Feshbach resonance

S. J. J. M. F. Kokkelmans, H. M. J. Vissers, BOUDEWIJN J. VERHAAR

Comptes Rendus de l Académie des Sciences - Series IV - Physics-AstrophysicsJun 1, 20013 citations

^{39}\mathrm{KCs}

^{41}\mathrm{KCs}

, and

^{40}\mathrm{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.