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A realizable multi-bit dense coding scheme with an Einstein–Podolsky–Rosen channel |
| Guo Qi (郭奇)a, Cheng Liu-Yong (程留永)b, Wang Hong-Fu (王洪福)a, Zhang Shou (张寿)a, Yeon Kyu-Hwangc |
a Department of Physics, College of Science, Yanbian University, Yanji 133002, China;
b Center for the Condensed-Matter Science and Technology, Department of Physics, Harbin Institute of Technology, Harbin 150001, China;
c BK21 Program Physics & Department of Physics, College of Natural Science, Chungbuk National University, Cheonju, Chungbuk 361-763, Republic of Korea |
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Abstract We propose a multi-bit dense coding scheme by using only an Einstein-Podolsky-Rosen (EPR) channel and assistant qubits. It is shown that no matter how many classical bits there are, the quantum channel is always a Bell state. The present dense coding process can also prepare non-local multi-particle Greenberger-Horne-Zeilinger (GHZ) states at one of the participants. The quantum circuits for this dense coding process are constructed, the deterministic implementation method in an optical system based on the cross-Kerr nonlinearities is shown.
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Received: 09 January 2012
Revised: 24 May 2012
Accepted manuscript online:
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PACS:
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03.65.-w
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(Quantum mechanics)
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03.67.-a
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(Quantum information)
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| Fund: Project supported by the National Natural Science Foundation of China (Grant Nos. 61068001 and 11147174). |
Corresponding Authors:
Zhang Shou
E-mail: szhang@ybu.edu.cn
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Cite this article:
Guo Qi (郭奇), Cheng Liu-Yong (程留永), Wang Hong-Fu (王洪福), Zhang Shou (张寿), Yeon Kyu-Hwang A realizable multi-bit dense coding scheme with an Einstein–Podolsky–Rosen channel 2012 Chin. Phys. B 21 100301
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