title: Neutral atom quantum register.
abstract: We demonstrate the realization of a quantum register using a string of single neutral atoms which are trapped in an optical dipole trap. The atoms are selectively and coherently manipulated in a magnetic field gradient using microwave radiation. Our addressing scheme operates with a high spatial resolution, and qubit rotations on individual atoms are performed with 99% contrast. In a final readout operation we analyze each individual atomic state. Finally, we have measured the coherence time and identified the predominant dephasing mechanism for our register.
authors.affiliation: Institut für Angewandte Physik, Universität Bonn, Wegelerstrasse 8, D-53115 Bonn, Germany.
authors.forename: D
authors.initials: D
authors.lastname: Schrader
authors.forename: I
authors.initials: I
authors.lastname: Dotsenko
authors.forename: M
authors.initials: M
authors.lastname: Khudaverdyan
authors.forename: Y
authors.initials: Y
authors.lastname: Miroshnychenko
authors.forename: A
authors.initials: A
authors.lastname: Rauschenbeutel
authors.forename: D
authors.initials: D
authors.lastname: Meschede