Quantum nondemolition measurement of two-photon Bell-state and three-photon Greenberger-Horne-Zeilinger-state based on weak nonlinearities

被引：6
|
作者：
Ding Dong [1 ,2 ]
Yan Feng-Li [2 ]
机构：
[1] North China Inst Sci & Technol, Dept Basic Curriculum, Beijing 101601, Peoples R China
[2] Hebei Normal Univ, Coll Phys Sci & Informat Engn, Shijiaghuang 050024, Peoples R China
来源：
ACTA PHYSICA SINICA | 2013年 / 62卷 / 10期
基金：
中国国家自然科学基金;
关键词：
Bell-state detection; Greenberger-Horne-Zeilinger-state detection; weak nonlinearity; quantum nondemolition detection; ENTANGLEMENT; ANALYZERS;
D O I：
10.7498/aps.62.100304
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
The scheme for quantum nondemolition measurement of two-photon Bell-state and three-photon Greenberger-Horne-Zeilinger (GHZ)-state is proposed based on weak nonlinearities and linear-optics elements. We first describe a scheme of the symmetry analyzer for two-photon Bell-state by using beam splitters and cross-Kerr nonlinear medium. According to this symmetry analyzer for two-photon Bell-state and the controlled-NOT gates we construct a three-photon state analyzer which can completely and nondestructively discriminate eight three-photon GHZ states.
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页数：5
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