| Noisy teleportation of qubit states via the Greenberger-Horne-Zeilinger state or the W state |
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| 引用本文： | 李艳玲,方卯发,肖兴,吴超,侯丽珍. Noisy teleportation of qubit states via the Greenberger-Horne-Zeilinger state or the W state[J]. 中国物理 B, 2010, 19(6): 60306-060306. DOI: 10.1088/1674-1056/19/6/060306 |
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| 作者姓名： | 李艳玲 方卯发 肖兴 吴超 侯丽珍 |
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| 作者单位： | Key Laboratory of Low-Dimensional Quantum Structures and Quantum Control, Ministry of Education, College of Physics and Information Science, Hunan Normal University, Changsha 410081, China |
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| 基金项目： | Project supported by the National Natural Science Foundation ofChina (Grant No.~10374025), the Natural Science Foundation of HunanProvince of China (Grant No.~07JJ3013) and the Scientific Research Fundof the Educational Department of Hunan Province of |
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| 摘 要： | The effects of distributing entanglement through the amplitudedamping channel or the phase damping channel on the teleportation ofa single-qubit state via the Greenberger--Horne--Zeilinger state and the Wstate are discussed. It is found that the average fidelity ofteleportation depends on the type and rate of the damping in thechannel. For the one-qubit affected case, theGreenberger--Horne--Zeilinger state is as robust as the W state,i.e., the same quantum information is preserved throughteleportation. For the two-qubit affected case, the W state is more robustwhen the entanglement is distributed via the amplitude dampingchannel; if the entanglement is distributed via the phase dampingchannel, the W state is more robust when the noisy parameter issmall while the Greenberger--Horne--Zeilinger state becomes morerobust when it is large. For the three-qubit affected case, theGreenberger--Horne--Zeilinger state is more robust than the Wstate.
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| 关 键 词： | noisy teleportation amplitude damping channel phase damping channel |
| 收稿时间： | 2009-10-24 |
Noisy teleportation of qubit states via the Greenberger－Horne－Zeilinger state or the W state |
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| Li Yan-Ling,FangMao-F,Xiao Xing,Wu Chao and Hou Li-Zhen. Noisy teleportation of qubit states via the Greenberger－Horne－Zeilinger state or the W state[J]. Chinese Physics B, 2010, 19(6): 60306-060306. DOI: 10.1088/1674-1056/19/6/060306 |
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| Authors: | Li Yan-Ling FangMao-F Xiao Xing Wu Chao Hou Li-Zhen |
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| Affiliation: | Key Laboratory of Low-Dimensional Quantum Structures and Quantum Control, Ministry of Education, College of Physics and Information Science, Hunan Normal University, Changsha 410081, China |
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| Abstract: | The effects of distributing entanglement through the amplitudedamping channel or the phase damping channel on the teleportation ofa single-qubit state via the Greenberger--Horne--Zeilinger state and the Wstate are discussed. It is found that the average fidelity ofteleportation depends on the type and rate of the damping in thechannel. For the one-qubit affected case, theGreenberger--Horne--Zeilinger state is as robust as the W state,i.e., the same quantum information is preserved throughteleportation. For the two-qubit affected case, the W state is more robustwhen the entanglement is distributed via the amplitude dampingchannel; if the entanglement is distributed via the phase dampingchannel, the W state is more robust when the noisy parameter issmall while the Greenberger--Horne--Zeilinger state becomes morerobust when it is large. For the three-qubit affected case, theGreenberger--Horne--Zeilinger state is more robust than the Wstate. |
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| Keywords: | noisy teleportation amplitude damping channel phasedamping channel |
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