Distributed quantum information processing via quantum

被引：12
作者：
Liu Jun
Wang Qiong
Kuang Le-Man
Zeng Hao-Sheng [1 ]
机构：
[1] Hunan Normal Univ, Minist Educ, Key Lab Low Dimens Quantum Struct & Quantum Contr, Changsha 410081, Hunan, Peoples R China
来源：
CHINESE PHYSICS B | 2010年 / 19卷 / 03期
基金：
中国国家自然科学基金;
关键词：
quantum-dot spins; nonlocal quantum gates; polarised photon; ELECTRON-SPIN; COMPUTATION; DOTS; ENTANGLEMENT; CHANNELS; STATES;
D O I：
10.1088/1674-1056/19/3/030313
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
We propose a scheme to engineer a non-local two-qubit phase gate between two remote quantum-dot spins. Along with one-qubit local operations, one can in principal perform various types of distributed quantum information processing. The scheme employs a photon with linearly polarisation interacting one after the other with two remote quantum-dot spins in cavities. Due to the optical spin selection rule, the photon obtains a Faraday rotation after the interaction process. By measuring the polarisation of the final output photon, a non-local two-qubit phase gate between the two remote quantum-dot spins is constituted. Our scheme may has very important applications in the distributed quantum information processing.
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页数：7
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