https://doi.org/10.1007/s100530170009
Damping and frequency shift in the oscillations of two colliding Bose-Einstein condensates
1
INFM-LENS-Dipartimento di Fisica, Università di Firenze,
Largo E. Fermi 2, 50125 Firenze, Italy
2
Dipartimento di Fisica, Università di Padova,
Via F. Marzolo 8, 35131 Padova, Italy
Corresponding author: a modugno@fi.infn.it
Received:
28
May
2001
Published online: 15 December 2001
We have investigated the center-of-mass oscillations of a 87Rb Bose-Einstein condensate in an elongated magneto-static trap. We start from a trapped condensate and we transfer part of the atoms to another trapped level, by applying a radio-frequency pulse. The new condensate is produced far from its equilibrium position in the magnetic potential, and periodically collides with the parent condensate. We discuss how both the damping and the frequency shift of the oscillations are affected by the mutual interaction between the two condensates, in a wide range of trapping frequencies. The experimental data are compared with the prediction of a mean-field model.
PACS: 03.75.Fi – Phase coherent atomic ensembles; quantum condensation phenomena / 05.30.Jp – Boson systems / 32.80.Pj – Optical cooling of atoms; trapping / 34.20.Cf – Interatomic potentials and forces
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag, 2001
