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Cai--Li Communication Protocol in Noisy Quantum Channel |
| Lü Hua1;YAN Xu-Dong1;ZHANG Xian-Zhou2 |
| 1Department of Mathematics and Physics, Hubei Polytechnic University, Wuhan 430068
2Department of Physics, Henan Normal University, Xinxiang 453000 |
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| Cite this article: |
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Lü Hua, YAN Xu-Dong, ZHANG Xian-Zhou 2004 Chin. Phys. Lett. 21 2340-2342 |
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Abstract Since the original Cai--Li protocol [Chin. Phys. Lett. 21(2004)601] can be used only in an ideal quantum communication, we present the modified Cai--Li protocol that can be used in the a noisy quantum channel by using Calderbank--Shor--Steane (CSS) codes to correct errors. We also give a tight bound on the connection between information Eve eavesdropped with a measurement attack in line B → A and detection probability, which shows that the Cai--Li protocol can be used as a quasisecure direct quantum communication.
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| Keywords:
03.67.Dd
03.67.Hk
03.67.-a
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Published: 01 December 2004
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| PACS: |
03.67.Dd
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(Quantum cryptography and communication security)
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03.67.Hk
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(Quantum communication)
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03.67.-a
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(Quantum information)
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