New High-Efficiency Source of a Three-Photon W State and its Full Characterization Using Quantum State Tomography

作     者：Hideharu Mikami Yongmin Li Kyosuke Fukuoka Takayoshi Kobayashi 

作者机构：Core Research for Evolutional Science and Technology (CREST) Japan Science and Technology Agency (JST) Tokyo Japan and Department of Physics Graduate School of Science University of Tokyo 7-3-1 Hongo Bunkyo Tokyo 113-0033 Japan 

出 版 物：《Physical Review Letters》 (Phys Rev Lett)

年 卷 期：2005年第95卷第15期

页      面：150404-150404页

核心收录：

学科分类：07[理学] 0702[理学-物理学] 

主　　题：Photons 

摘      要：We propose and demonstrate a new scheme of high-efficiency generation of the three-photon polarization-entangled W state, which is a typical three-qubit entangled state. The high efficiency has enabled the first full characterization of the state by quantum state tomography. We have analyzed the obtained state and observed its nature of tripartite entanglement and robustness of entanglement.