Efficient entanglement concentration for partially entangled cluster states with weak cross-Kerr nonlinearity

被引：0
作者：
Huan-Juan Liu
Lin-Lin Fan
Yan Xia
Jie Song
机构：
[1] Fuzhou University,Department of Physics
[2] Harbin Institute of Technology,Department of Physics
来源：
Quantum Information Processing | 2015年 / 14卷
关键词：
Entanglement concentration; Cluster state; Cross-Kerr nonlinearity;
D O I：
暂无
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学科分类号：
摘要：
In this paper, we propose an optimal entanglement concentration protocol (ECP) for partially entangled cluster states with the help of the weak cross-Kerr nonlinearity. We can obtain the maximally entangled cluster states assisted with the projection measurements on the additional photons. The protocol is based on optical elements, single polarization photons, cross-Kerr nonlinearity, and the conventional photon detectors, which are feasible with existing experimental technology. Numerical simulation demonstrates that by iterating the entanglement concentration process n=m=6\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$n=m=6$$\end{document} times, the ECP has the approximate maximal success probability 100 %. Moreover, the present protocol is also suitable for partially entangled 4N\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$4N$$\end{document}-photon cluster states concentration. All these advantages make this protocol more efficient and more convenient than others in the applications in quantum communication.
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页码：2909 / 2928
页数：19
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