Noisy teleportation of qubit states via the Greenberger－Horne－Zeilinger state or the W state

doi:10.1088/1674-1056/19/6/060306

Abstract The effects of distributing entanglement through the amplitude damping channel or the phase damping channel on the teleportation of a single-qubit state via the Greenberger--Horne--Zeilinger state and the W state are discussed. It is found that the average fidelity of teleportation depends on the type and rate of the damping in the channel. For the one-qubit affected case, the Greenberger--Horne--Zeilinger state is as robust as the W state, i.e., the same quantum information is preserved through teleportation. For the two-qubit affected case, the W state is more robust when the entanglement is distributed via the amplitude damping channel; if the entanglement is distributed via the phase damping channel, the W state is more robust when the noisy parameter is small while the Greenberger--Horne--Zeilinger state becomes more robust when it is large. For the three-qubit affected case, the Greenberger--Horne--Zeilinger state is more robust than the W state.

Keywords: noisy teleportation amplitude damping channel phase damping channel

Received: 24 October 2009
Accepted manuscript online:

PACS:	03.65.Ud	(Entanglement and quantum nonlocality)
	03.67.Lx	(Quantum computation architectures and implementations)
	03.67.Hk	(Quantum communication)

Fund: Project supported by the National Natural Science Foundation of China (Grant No.~10374025), the Natural Science Foundation of Hunan Province of China (Grant No.~07JJ3013) and the Scientific Research Fund of the Educational Department of Hunan Province of

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Li Yan-Ling(李艳玲), Fang Mao-Fa(方卯发), Xiao Xing(肖兴), Wu Chao(吴超), and Hou Li-Zhen(侯丽珍) Noisy teleportation of qubit states via the Greenberger－Horne－Zeilinger state or the W state 2010 Chin. Phys. B 19 060306

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Noisy teleportation of qubit states via the Greenberger－Horne－Zeilinger state or the W state

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