Echo spectroscopy of atomic dynamics in a Gaussian trap via phase imprints
QUANTOP, Danish National Research Foundation Center for Quantum Optics, Niels Bohr Institute, University of Copenhagen, Blegdamsvej 17, 2100 Copenhagen Ø, Denmark
Corresponding author: a email@example.com
Published online: 18 October 2008
We report on the collapse and revival of Ramsey fringe visibility when a spatially dependent phase is imprinted in the coherences of a trapped ensemble of two-level atoms. The phase is imprinted via the light shift from a Gaussian laser beam which couples the dynamics of internal and external degrees of freedom for the atoms in an echo spectroscopy sequence. The observed revivals are directly linked to the oscillatory motion of atoms in the trap. An understanding of the effect is important for quantum state engineering of trapped atoms.
PACS: 42.50.Dv – Quantum state engineering and measurements / 06.30.Ft – Time and frequency
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag, 2008