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6 papers
Observation of interspecies Feshbach resonances in an ultracold Rb-Cs mixture
K. Pilch, A. D. Lange, A. Prantner +4
We report on the observation of interspecies Feshbach resonances in an ultracold, optically trapped mixture of Rb and Cs atoms. In a magnetic field range up to 300 G we find 23 int…
Determination of atomic scattering lengths from measurements of molecular binding energies near Feshbach resonances
A. D. Lange, K. Pilch, A. Prantner +5
We present an analytic model to calculate the atomic scattering length near a Feshbach resonance from data on the molecular binding energy. Our approach considers finite-range squa…
Comparison of hyperfine anomalies in the 5S_{1/2} and 6S_{1/2} levels of ^{85}Rb and ^{87}Rb
A. Perez Galvan, Y. Zhao, L. A. Orozco +4
We observe a hyperfine anomaly in the measurement of the hyperfine splitting of the 6S_{1/2} excited level in rubidium. We perform two step spectroscopy using the 5S_{1/2}->5P_{1/2…
Experimental Evidence for Efimov Quantum States
H. -C. Naegerl, T. Kraemer, M. Mark +8
Three interacting particles form a system which is well known for its complex physical behavior. A landmark theoretical result in few-body quantum physics is Efimov's prediction of…
Evidence for Efimov quantum states in an ultracold gas of cesium atoms
T. Kraemer, M. Mark, P. Waldburger +8
Systems of three interacting particles are notorious for their complex physical behavior. A landmark theoretical result in few-body quantum physics is Efimov's prediction of a univ…
Lifetime Measurement of the 6s Level of Rubidium
E. Gomez, F. Baumer, A. D. Lange +2
We present a lifetime measurements of the 6s level of rubidium. We use a time-correlated single-photon counting technique on two different samples of rubidium atoms. A vapor cell w…