Four-photon W state using two-crystal geometry parametric down-conversion

作     者：Yongmin Li Takayoshi Kobayashi 

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

出 版 物：《Physical Review A》 (物理学评论A辑：原子、分子和光学物理学)

年 卷 期：2004年第70卷第1期

页      面：014301-014301页

核心收录：

学科分类：070207[理学-光学] 07[理学] 08[工学] 0803[工学-光学工程] 0702[理学-物理学] 

主　　题：HORNE-ZEILINGER ENTANGLEMENT QUANTUM CRYPTOGRAPHY TELEPORTATION COMMUNICATION PHOTONS 

摘      要：An experimental scheme for producing a four-photon entangled W state directly from the parametric down-conversion of a two-crystal geometry is proposed. In our scheme, only linear optical elements and photon detectors are required. Sophisticated and fragile interferometric setups are unnecessary.