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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 |
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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.
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Received: 22 June 2009
Revised: 22 July 2009
Accepted manuscript online:
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PACS:
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03.67.Lx
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(Quantum computation architectures and implementations)
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42.50.-p
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(Quantum optics)
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73.21.La
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(Quantum dots)
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| Fund: 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. |
Cite this article:
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 2010 Chin. Phys. B 19 030313
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