Deterministic Entanglement Purification of the Greenberger-Horne-Zeilinger States in Quantum-Dot and Micro-cavity Coupled System

被引：1
|
作者：
Wang, Yi Jun [1 ]
Fu, Jie [1 ]
Guo, Ying [1 ]
Huang, Dazu [1 ,2 ]
机构：
[1] Cent S Univ, Sch Informat Sci & Engn, Changsha 410083, Peoples R China
[2] Hunan Univ Finance & Econ, Dept Informat Management, Changsha 410205, Hunan, Peoples R China
来源：
INTERNATIONAL JOURNAL OF THEORETICAL PHYSICS | 2014年 / 53卷 / 07期
基金：
中国国家自然科学基金; 中国博士后科学基金;
关键词：
Entanglement; Quantum purification; Greenberger-Horne-Zeilinger state; Quantum information; CHANNELS;
D O I：
10.1007/s10773-014-2030-z
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
An improved purification of the triplet Greenberger-Horne-Zeilinger (GHZ) state is demonstrated for the electron-spin-entangled state in the quantum-dot (QD) and micro-cavity coupled systems. In order to distill the maximally entangled GHZ state efficiently, we designate a deterministic entanglement purification protocol (EPP) by using a pair of the triplet-electron-spin-entangled systems. It is based on the elegant parity-check operations performed in the cavity-spin-coupling system with the assistance of an ancillary single photon. With the current and feasible technology, the maximally entangled GHZ states can be achieved as much as flexible for the long-distance quantum communications since only single-photon detection and single-electron detection are required in practice.
引用
收藏
页码：2304 / 2311
页数：8
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