Distributed quantum information processing via quantum dot spins

doi:10.1088/1674-1056/19/3/030313

中国物理B ›› 2010, Vol. 19 ›› Issue (3): 30313-030313.doi: 10.1088/1674-1056/19/3/030313

Distributed quantum information processing via quantum dot spins

刘军, 王琼, 匡乐满, 曾浩生

Key Laboratory of Low-Dimensional Quantum Structures and Quantum Control of Ministry of Education, and Department of Physics, Hunan Normal University, Changsha 410081, China

收稿日期:2009-06-22 修回日期:2009-07-22 出版日期:2010-03-15 发布日期:2010-03-15
基金资助:
Project supported by the National Fundamental Research Program of China (Grant No.~2007CB925204), the National Natural Science Foundation of China (Grant No.~10775048), the Key Project of Chinese Ministry of Education (Grant No.~206103), and the Construct Program of the National Key Discipline.

Distributed quantum information processing via quantum dot spins

Liu Jun(刘军), Wang Qiong(王琼), Kuang Le-Man(匡乐满), and Zeng Hao-Sheng(曾浩生)^†

Key Laboratory of Low-Dimensional Quantum Structures and Quantum Control of Ministry of Education, and Department of Physics, Hunan Normal University, Changsha 410081, China

Received:2009-06-22 Revised:2009-07-22 Online:2010-03-15 Published:2010-03-15
Supported by:
Project supported by the National Fundamental Research Program of China (Grant No.~2007CB925204), the National Natural Science Foundation of China (Grant No.~10775048), the Key Project of Chinese Ministry of Education (Grant No.~206103), and the Construct Program of the National Key Discipline.

摘要/Abstract

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.

Abstract: 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.

Key words: quantum-dot spins, nonlocal quantum gates, polarised photon

中图分类号: (Quantum computation architectures and implementations)

03.67.Lx

42.50.-p (Quantum optics) 73.21.La (Quantum dots)

刘军, 王琼, 匡乐满, 曾浩生. Distributed quantum information processing via quantum dot spins[J]. 中国物理B, 2010, 19(3): 30313-030313.

Liu Jun(刘军), Wang Qiong(王琼), Kuang Le-Man(匡乐满), and Zeng Hao-Sheng(曾浩生). Distributed quantum information processing via quantum dot spins[J]. Chin. Phys. B, 2010, 19(3): 30313-030313.

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Distributed quantum information processing via quantum dot spins

Distributed quantum information processing via quantum dot spins

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