Experimental realization of a four-photon seven-qubit graph state for one-way quantum computation
Sang Min Lee, Hee Su Park, Jaeyoon Cho, Yoonshik Kang, Jae Yong Lee, Heonoh Kim, Dong-Hoon Lee, Sang-Kyung Choi · Optics Express · 2012
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%.