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 state 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 execute the general two-qubit Deutsch-Jozsa algorithm with a success probability greater than 90%.

4 pages. Supplementary Material is included in the zip file

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• Experimental Realization of a One-way Quantum Computer Algorithm Solving Simon's Problem
• Quantum tomography of photon states encoded in polarization and picosecond time-bins
• Experimental demonstration of a measurement-based realisation of a quantum channel
• Physical Realization of Measurement Based Quantum Computation
• Experimental characterization of a non-local convertor for quantum photonic networks