title: Observation of quantum jumps in a superconducting artificial atom.
abstract: We continuously measure the state of a superconducting quantum bit coupled to a microwave readout cavity by using a fast, ultralow-noise parametric amplifier. This arrangement allows us to observe quantum jumps between the qubit states in real time, and should enable quantum error correction and feedback--essential components of quantum information processing.
authors.affiliation: Quantum Nanoelectronics Laboratory, Department of Physics, University of California, Berkeley, California 94720, USA.
authors.forename: R
authors.initials: R
authors.lastname: Vijay
authors.forename: D H
authors.initials: DH
authors.lastname: Slichter
authors.forename: I
authors.initials: I
authors.lastname: Siddiqi