Feshbach resonances in cesium at ultralow static magnetic fields
Authors: Papoular D.J., Bize S., Clairon A., Marion H., Kokkelmans SJJMF., Shlyapnikov GV.
Autors Affiliation: INO-CNR BEC Center and Dipartimento di Fisica, Università di Trento, 38123 Povo, Italy,
Laboratoire de Physique Théorique et Modèles Statistiques, CNRS, Université Paris-Sud, F-91405, Orsay, France;
LNE-SYRTE, Observatoire de Paris, CNRS, UPMC, F-75014 Paris, France;
Eindhoven University of Technology, Post Office Box 513, 5600 MB Eindhoven, The Netherlands;
Van der Waals–Zeeman Institute, University of Amsterdam, Science Park 904, 1098 XH Amsterdam, The Netherlands
Abstract: We have observed Feshbach resonances for Cs-133 atoms in two different hyperfine states at static magnetic fields of a few milligauss. These resonances are unusual for two main reasons. First, they are the lowest static-field resonances investigated up to now, and we explain their multipeak structure in these ultralow fields. Second, they are robust with respect to temperature effects. We have measured them using an atomic fountain clock and reproduced them using coupled-channels calculations, which are in excellent agreement with our measurements. We show that these are s-wave resonances due to a very weakly bound state of the triplet molecular Hamiltonian. We also describe a model explaining their asymmetric shape in the regime where the kinetic energy dominates over the coupling strength.
Journal/Review: PHYSICAL REVIEW A
Volume: 86 (4) Pages from: 040701 to: 040701
More Information: Publisher: AMER PHYSICAL SOC, ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
DOI: 10.1103/PhysRevA.86.040701KeyWords: BOSE-EINSTEIN CONDENSATION; ULTRACOLD COLLISIONS; FREQUENCY STANDARD; FOUNTAIN; GASESDOI: 10.1103/PhysRevA.86.040701Citations: 4data from “WEB OF SCIENCE” (of Thomson Reuters) are update at: 2019-09-15References taken from IsiWeb of Knowledge: (subscribers only)Connecting to view paper tab on IsiWeb: Click hereConnecting to view citations from IsiWeb: Click here