Feshbach resonances in ultracold K-39

Year: 2007

Authors: D’Errico C., Zaccanti M., Fattori M., Roati G., Inguscio M., Modugno G., Simoni A.

Autors Affiliation: LENS and Dipartimento di Fisica, Università di Firenze, Via Nello Carrara 1, 50019 Sesto Fiorentino, Italy;
INFN, Via Sansone 1, 50019 Sesto Fiorentino, Italy;
Museo Storico della Fisica e Centro Studi e Ricerche ‘Enrico Fermi’, Compendio del Viminale, 00184 Roma, Italy;
CNR-INFM, Via Sansone 1, 50019 Sesto Fiorentino, Italy;
Laboratoire de Physique des Atomes, Lasers, Molécules et Surfaces, UMR 6627 du CNRS and Université de Rennes, 35042 Rennes Cedex, France

Abstract: We discover several magnetic Feshbach resonances in collisions of ultracold K-39 atoms, by studying atom losses and molecule formation. Accurate determination of the magnetic-field resonance locations allows us to optimize a quantum collision model for potassium isotopes. We employ the model to predict the magnetic-field dependence of scattering lengths and of near-threshold molecular levels. Our findings will be useful to plan future experiments on ultracold K-39 atoms and molecules.


Volume: 9      Pages from: 223-1  to: 223-13

KeyWords: Isotopes; Magnetic field effects; Magnetic resonance; Molecular dynamics; Quantum theory; Scattering, Molecular levels; Molecule formation; Scattering lengths, Potassium; Bose-Einstein condensation; Interacting Fermi gas; Dispersion coefficients; Optical lattice; Recombination
DOI: 10.1088/1367-2630/9/7/223

Citations: 118
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