2012/12/31 by Martin Berninger, Alessandro Zenesini, Bo Huang +7 · 1 citation
Physics and Astronomy · #Atomic and Subatomic Physics Research #Atomic physics #Bound state #Cold Atom Physics and Bose-Einstein Condensates #Feshbach resonance #Field (mathematics) #Ground state #Magnetic field #Materials science #Measure (data warehouse) #Molecule #Physics #Quantum mechanics #Quantum, superfluid, helium dynamics #Range (aeronautics) #Scattering #Scattering length #Spectroscopy #cond-mat.quant-gas #physics.atom-ph
paper · pdf · doi:10.1103/physreva.87.032517
published as Phys. Rev. A 87, 032517 (2013) · 19 pages, 18 figures
openalex publication_date 2013/03/25 · arxiv created 2013/04/03 · arxiv updated 2013/04/04 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
We explore the scattering properties of ultracold ground-state Cs atoms at magnetic fields between 450 G (45 mT) and 1000 G. We identify 17 previously unreported Feshbach resonances, including two very broad ones near 549 and 787 G. We measure the binding energies of several different dimer states by magnetic field modulation spectroscopy. We use least-squares fitting to these experimental results, together with previous measurements at lower field, to determine a six-parameter model of the long-range interaction potential, designated M2012. Coupled-channels calculations using M2012 provide an accurate mapping between the s-wave scattering length and the magnetic field over the entire range of fields considered. This mapping is crucial for experiments that rely on precise tuning of the scattering length, such as those on Efimov physics.