M. Repp

Observation of Efimov resonances in a mixture with extreme mass imbalance.

We observe two consecutive heteronuclear Efimov resonances in an ultracold Li-Cs mixture by measuring three-body loss coefficients as a function of magnetic field near a Feshbach resonance. The first resonance is detected at a scattering length of a_((0))=-320(10)a_((0)), corresponding to ∼7(∼3) times the Li-Cs (Cs-Cs) van der Waals range. The second resonance appears at 5.8(1.0)a_((0)), close to the unitarity-limited regime at the sample temperature of 450 nK. Indication of a third resonance is found in the atom loss spectra. The scaling of the resonance positions is close to the predicted universal scaling value of 4.9 for zero temperature. Deviations from universality might be caused by finite-range and temperature effects, as well as magnetic field-dependent Cs-Cs interactions.

Ultracold Molecules Formed by Photoassociation: Heteronuclear Dimers, Inelastic Collisions, and Interactions with Ultrashort Laser Pulses

Dimers, Inelastic Collisions, and Interactions with Ultrashort Laser Pulses Juris Ulmanis,† Johannes Deiglmayr,‡ Marc Repp,† Roland Wester, and Matthias Weidemüller*,† †Physikalisches Institut, Ruprecht-Karls-Universitaẗ Heidelberg, Philosophenweg 12, 69120 Heidelberg, Germany ‡Laboratorium für Physikalische Chemie, ETH Zürich, Wolfgang-Pauli-Strasse 10, 8093 Zürich, Switzerland Institut für Ionenphysik und Angewandte Physik, Universitaẗ Innsbruck, Technikerstrasse 25/3, 6020 Innsbruck, Austria

Observation of interspecies6Li-133Cs Feshbach resonances

We report on the observation of 19 interspecies Feshbach resonances in an optically trapped ultracold Bose-Fermi mixture of

Population redistribution in optically trapped polar molecules

{}^{133}\text{Cs}

Analyzing Feshbach resonances: A 6 Li - 133 Cs case study

and

Dipolar effects and collisions in an ultracold gas of LiCs molecules

{}^{6}\text{Li}

Ultracold Polar Molecules in the Rovibrational Ground State

in the two energetically lowest spin states. We assign the resonances to

Influence of a Feshbach resonance on the photoassociation of LiCs

s

Inelastic collisions of ultracold polar LiCs molecules with caesium atoms in an optical dipole trap

- and

Permanent dipole moment of LiCs in the ground state

p