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Perfect quantum teleportation and dense coding protocols via the 2N-qubit W state |
Wang Mei-Yu(王美玉)a)b) and Yan Feng-Li(闫凤利) a)b)† |
a College of Physics Science and Information Engineering, Hebei Normal University, Shijiazhuang 050016, China; b Hebei Advanced Thin Films Laboratory, Shijiazhuang 050016, China |
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Abstract In this paper, we investigate perfect quantum teleportation and dense coding by using an 2N-qubit W state channel. In the quantum teleportation scheme, an unknown N-qubit entangled state can be perfectly teleported. One ebit of entanglement and two bits of classical communication are consumed in the teleportation process, just like when using the Bell state channel. While N+1 bits of classical information can be transmitted by only sending N particles in the dense coding protocol.
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Received: 18 May 2011
Revised: 21 July 2011
Accepted manuscript online:
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PACS:
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03.67.Hk
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(Quantum communication)
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Fund: Project supported by the National Natural Science Foundation of China (Grant Nos. 10971247 and 10905016), the Natural Science Foundation of Hebei Province of China (Grant Nos. F2009000311 and A2010000344), and the Science Foundation of Hebei Normal University (Grant No. L2010Q04). |
Cite this article:
Wang Mei-Yu(王美玉) and Yan Feng-Li(闫凤利) Perfect quantum teleportation and dense coding protocols via the 2N-qubit W state 2011 Chin. Phys. B 20 120309
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