title: Quantum information processing with trapped Ca(+) ions.
abstract: Quantum information processing is performed with single trapped Ca(+) ions, stored in a linear Paul trap and laser-cooled to the ground state of their harmonic quantum motion. Composite laser-pulse sequences were used to implement SWAP gate, phase gate and controlled-NOT gate operations. Stark shifts on the quantum-bit transitions were precisely measured and compensated. For a demonstration of quantum information processing, a Deutsch-Jozsa algorithm has been implemented using two quantum bits encoded on a single ion.
authors.affiliation: Institut für Experimentalphysik, Universität Innsbruck, Technikerstrasse 25, 6020 Innsbruck, Austria.
authors.forename: S
authors.initials: S
authors.lastname: Gulde
authors.forename: H
authors.initials: H
authors.lastname: Häffner
authors.forename: M
authors.initials: M
authors.lastname: Riebe
authors.forename: G
authors.initials: G
authors.lastname: Lancaster
authors.forename: C
authors.initials: C
authors.lastname: Becher
authors.forename: J
authors.initials: J
authors.lastname: Eschner
authors.forename: F
authors.initials: F
authors.lastname: Schmidt-Kaler
authors.forename: I L
authors.initials: IL
authors.lastname: Chuang
authors.forename: R
authors.initials: R
authors.lastname: Blatt