title: Ramsey interferometry with an atom laser.
abstract: We present results on a free-space atom interferometer operating on the first order magnetically insensitive |F = 1,mF = 0) --> |F = 2,mF = 0) ground state transition of Bose-condensed (87)Rb atoms. A pulsed atom laser is output-coupled from a Bose-Einstein condensate and propagates through a sequence of two internal state beam splitters, realized via coherent Raman transitions between the two interfering states. We observe Ramsey fringes with a visibility close to 100% and determine the current and the potentially achievable interferometric phase sensitivity. This system is well suited to testing recent proposals for generating and detecting squeezed atomic states.
authors.affiliation: Australian Research Council Centre of Excellence for Quantum-Atom Optics, The Australian National University, ACT 0200, Australia. daniel.doering@anu.edu.au
authors.forename: D
authors.initials: D
authors.lastname: Döring
authors.forename: J E
authors.initials: JE
authors.lastname: Debs
authors.forename: N P
authors.initials: NP
authors.lastname: Robins
authors.forename: C
authors.initials: C
authors.lastname: Figl
authors.forename: P A
authors.initials: PA
authors.lastname: Altin
authors.forename: J D
authors.initials: JD
authors.lastname: Close