caa a22 4500 445867337 CHVBK 20180317145501.0 cr unu---uuuuu 170323e20111101xx s 000 0 eng 10.1140/epjd/e2011-10716-1 doi (NATIONALLICENCE)springer-10.1140/epjd/e2011-10716-1 A high phase-space density mixture of 87Rb and 133Cs: towards ultracold heteronuclear molecules [Elektronische Daten] [H. Cho, D. McCarron, D. Jenkin, M. Köppinger, S. Cornish] We report the production of a high phase-space density mixture of 87Rb and 133Cs atoms in a levitated crossed optical dipole trap as the first step towards the creation of ultracold RbCs molecules via magneto-association. We present a simple and robust experimental setup designed for the sympathetic cooling of 133Cs via interspecies elastic collisions with 87Rb. Working with the |F = 1,m F = +1〉 and the |3, +3〉 states of 87Rb and 133Cs respectively, we measure a high interspecies three-body inelastic collision rate ∼10−25−10−26 cm6   s−1 which hinders the sympathetic cooling. Nevertheless by careful tailoring of the evaporation we can produce phase-space densities near quantum degeneracy for both species simultaneously. In addition we report the observation of an interspecies Feshbach resonance at 181.7(5) G and demonstrate the creation of Cs2 molecules via magneto-association on the 4(g)4 resonance at 19.8 G. These results represent important steps towards the creation of ultracold RbCs molecules in our apparatus. EDP Sciences, SIF, Springer-Verlag Berlin Heidelberg, 2011 Cho H. Department of Physics, Durham University, Rochester Building, Science Laboratories, South Road, DH1 3LE, Durham, UK aut McCarron D. Department of Physics, Durham University, Rochester Building, Science Laboratories, South Road, DH1 3LE, Durham, UK aut Jenkin D. Department of Physics, Durham University, Rochester Building, Science Laboratories, South Road, DH1 3LE, Durham, UK aut Köppinger M. Department of Physics, Durham University, Rochester Building, Science Laboratories, South Road, DH1 3LE, Durham, UK aut Cornish S. Department of Physics, Durham University, Rochester Building, Science Laboratories, South Road, DH1 3LE, Durham, UK aut The European Physical Journal D Springer-Verlag 65/1-2(2011-11-01), 125-131 1434-6060 65:1-2<125 2011 65 10053 https://doi.org/10.1140/epjd/e2011-10716-1 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1140/epjd/e2011-10716-1 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Cho H. Department of Physics, Durham University, Rochester Building, Science Laboratories, South Road, DH1 3LE, Durham, UK aut NATIONALLICENCE 700 1- McCarron D. Department of Physics, Durham University, Rochester Building, Science Laboratories, South Road, DH1 3LE, Durham, UK aut NATIONALLICENCE 700 1- Jenkin D. Department of Physics, Durham University, Rochester Building, Science Laboratories, South Road, DH1 3LE, Durham, UK aut NATIONALLICENCE 700 1- Köppinger M. Department of Physics, Durham University, Rochester Building, Science Laboratories, South Road, DH1 3LE, Durham, UK aut NATIONALLICENCE 700 1- Cornish S. Department of Physics, Durham University, Rochester Building, Science Laboratories, South Road, DH1 3LE, Durham, UK aut NATIONALLICENCE 773 0- The European Physical Journal D Springer-Verlag 65/1-2(2011-11-01), 125-131 1434-6060 65:1-2<125 2011 65 10053 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer