Lee Sang Min, Park Hee Su, Cho Jaeyoon, Kang Yoonshik, Lee Jae Yong, Kim Heonoh, Lee Dong-Hoon, Choi Sang-Kyung
Korea Research Institute of Standards and Science, Daejeon 305-340, South Korea.
Opt Express. 2012 Mar 26;20(7):6915-26. doi: 10.1364/OE.20.006915.
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%.
我们提出并展示了通过路径量子比特融合来扩展光子图态。来自两个独立的双光子四量子比特态的两个路径量子比特被融合，以生成一个由偏振和路径量子比特组成的二维七量子比特图态。通过评估见证算符来验证真正的七量子比特纠缠。利用图态中的六个量子比特来演示用于一般两位函数的德乌斯-乔萨算法，成功率大于90%。
