場所： 浅野キャンパス 工学部９号館１階大会議室
講師： Dr. Simon Cornish (Durham University)
題目： “Towards ultracold heteronuclear RbCs molecules”
Ultracold and quantum degenerate mixtures of two or more atomicspecies open up many new research avenues, including the formation of ultracold heteronuclear ground-state molecules possessing
a permanent electric dipole moment. The anisotropic, long range dipole-dipole interactions between such molecules offers many potential applications, including novel schemes for quantum information processing and simulation. Our goal is to create ultracold ground-state RbCs molecules using magnetoassociation on a Feshbach resonance followed by optical transfer to the rovibronic ground state. The pre-requisite to this approach is the attainment of a high phase space density atomic mixture and the identification of suitable interspecies Feshbach resonances. Here we present the latest results from our experiment, including the realisation of a quantum degenerate mixture of 87Rb and 133Cs  and a detailed study of the Feshbach spectrum of an ultracold 85Rb-133Cs mixture .
Additionally we briefly discuss the development of a new apparatus for the production of ultracold ground-state YbCs molecules, where the presence of an un-paired electron spin offers many possibilities in the realm of quantum simulation.
 D.J. McCarron, H.W. Cho, D.L. Jenkin, M.P. Koeppinger and S.L.Cornish, Dual-species Bose- Einstein condensate of 87Rb and 133Cs, Phys. Rev. A 84 011603 (2011).
 H.-W. Cho, D. J. McCarron, D. L. Jenkin, M. Koppinger, C. L. Blackley, C. R. Le Sueur, J. M. Hutson and S. L. Cornish, “Feshbach spectroscopy of an ultracold 85Rb-133Cs mixture”, In preparation