title: Generation of atomic cluster states through the cavity input-output process.
abstract: We propose a scheme to implement a two-qubit controlled-phase gate for single atomic qubits, which works in principle with nearly ideal success probability and fidelity. Our scheme is based on the cavity input-output process and the single-photon polarization measurement. We show that, even with the practical imperfections such as atomic spontaneous emission, weak atom-cavity coupling, violation of the Lamb-Dicke condition, cavity photon loss, and detection inefficiency, the proposed gate is feasible for generation of a cluster state in that it meets the scalability criterion and it operates in a conclusive manner. We demonstrate a simple and efficient process to generate a cluster state with our high probabilistic entangling gate.
authors.affiliation: Division of Optical Metrology, Korea Research Institute of Standards and Science, Daejeon.
authors.forename: Jaeyoon
authors.initials: J
authors.lastname: Cho
authors.forename: Hai-Woong
authors.initials: HW
authors.lastname: Lee