title: Experimental realization of a four-photon seven-qubit graph state for one-way quantum computation.
abstract: We propose and demonstrate the scaling up of photonic graph states through path qubit fusion. Two path qubits from separate two-photon four-qubit states are fused to generate a two-dimensional seven-qubit graph state composed of polarization and path qubits. Genuine seven-qubit entanglement is verified by evaluating the witness operator. Six qubits from the graph state are used to demonstrate the Deutsch-Jozsa algorithm for general two-bit functions with a success probability greater than 90%.
authors.affiliation: Korea Research Institute of Standards and Science, Daejeon 305-340, South Korea.
authors.forename: Sang Min
authors.initials: SM
authors.lastname: Lee
authors.forename: Hee Su
authors.initials: HS
authors.lastname: Park
authors.forename: Jaeyoon
authors.initials: J
authors.lastname: Cho
authors.forename: Yoonshik
authors.initials: Y
authors.lastname: Kang
authors.forename: Jae Yong
authors.initials: JY
authors.lastname: Lee
authors.forename: Heonoh
authors.initials: H
authors.lastname: Kim
authors.forename: Dong-Hoon
authors.initials: DH
authors.lastname: Lee
authors.forename: Sang-Kyung
authors.initials: SK
authors.lastname: Choi
mesh_terms: D003198:Computer Simulation; D017076:Computer-Aided Design; D004867:Equipment Design; D019544:Equipment Failure Analysis; D008027:Light; D008962:Models, Theoretical; D055096:Optical Devices; D017785:Photons; D012542:Scattering, Radiation; D012815:Signal Processing, Computer-Assisted / Q000295:instrumentation*