基于弱交叉克尔非线性的C-GHZ态制备与分析

量子电子学报

基于弱交叉克尔非线性的C-GHZ态制备与分析

WU Chao, HU Zhanning

天津工业大学物理科学与技术学院，天津 300387

出版日期:2019-09-28 发布日期:2019-09-18
通讯作者: 胡占宁（1962—），北京人，博士，教授，主要从事量子信息学，凝聚态物理学方面的研究。 E-mail:alpha_chaowu@qq.com
作者简介:吴超（1993—），湖北黄冈人，研究生，主要从事量子信息学方面的研究。E-mail: wuxiaoxiaochao@outlook.com
基金资助:
Supported by National Natural Science Foundation of China（国家自然科学基金，61271011）

Preparation and analysis of C-GHZ state based on via weak cross-Kerr nonlinearity

吴超，胡占宁

School of Physical Science and Technology, Tianjin Polytechnic University, Tianjin 300387, China

Published:2019-09-28 Online:2019-09-18

摘要/Abstract

摘要： 为了解决C-GHZ（Concatenated GHZ）态制备复杂的问题，提出了一种基于弱交叉克尔非线性产生C-GHZ态的改进方案，结合零差探测技术和经典的前置反馈作用，用封装的光学元件模块和HWP 22.5°半波片，经反复操作，由简单的C-GHZ态推导出nm-GHZ态，最后得出C-GHZ态制备规律，得出所需辅助单光子数nm，模块数nm-1，HWP22.5°半波片数n。进行了成功率模拟和可行性分析，结果表明增大相干态的振幅强度和减少光子传输的损耗可以提高C-GHZ态制备的成功率。

关键词: 量子光学, C-GHZ态, 弱交叉克尔非线性, 零差探测

Abstract: In order to solve the complex problem of concatenated GHZ（C-GHZ） state preparation, an improved scheme of C-GHZ state based on weak cross Kerr nonlinearity is proposed. Using the packaged optical element module and HWP22.5°half-wave plate, combined with the homodyne detection technology and classical feed forward, the nm-GHZ state is derived from the simple C-GHZ state by repeated operation, and finally the preparation law of C-GHZ state is obtained. The required number of auxiliary single photons is nm, the number of modules is nm-1, and the number of HWP22.5° is n. The success rate simulation and feasibility analysis are conducted. Results show that increasing the amplitude intensity of coherent state and reducing the loss of photon transmission can improve the success rate of C-GHZ state preparation.

Key words: quantum optics, C-GHZ state, weak cross- Kerr nonlinearity, homodyne detection

吴超，胡占宁. 基于弱交叉克尔非线性的C-GHZ态制备与分析[J]. 量子电子学报.

WU Chao, HU Zhanning. Preparation and analysis of C-GHZ state based on via weak cross-Kerr nonlinearity[J]. Chinese Journal of Quantum Electronics.

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