Beyond the usual approximations: Time-dependent magnetic traps revisited
Authors: Mueller J.H., Morsch O., Ciampini D., Anderlini M., Mannella R., Arimondo E.
Autors Affiliation: Univ Pisa, Dipartimento Fis, INFM, I-56127 Pisa, Italy
Abstract: The motion of atoms in time-orbiting potential (TOP) traps is usually described by applying adiabatic and time-averaging approximations. In this work we show that careful experimental analysis reveals corrections to both of these approximations in the shape of a micromotion of the atoms at the frequency of the time-dependent trapping field and of a dependence of the equilibrium position of the atoms on the sense of rotation of the bias field. Whereas the former can be easily explained theoretically, the latter requires a more sophisticated analytical treatment involving geometric forces. We present experimental results and numerical simulations which agree well with the data. Furthermore, implications for Bose-Einstein condensation experiments are discussed. (C) 2001 Academie des sciences/Editions scientifiques et medicales Elsevier SAS.
Journal/Review: COMPTES RENDUS DE L ACADEMIE DES SCIENCES SERIE IV PHYSIQUE ASTROPHYSIQUE
Volume: 2 (4) Pages from: 649 to: 656
KeyWords: Ultra-cold atomsDOI: 10.1016/S1296-2147(01)01188-XCitations: 5data from “WEB OF SCIENCE” (of Thomson Reuters) are update at: 2023-01-29References taken from IsiWeb of Knowledge: (subscribers only)Connecting to view paper tab on IsiWeb: Click hereConnecting to view citations from IsiWeb: Click here