The decoherence of quantum entanglement and teleportation in Bell-diagonal states

QIN Meng; LI Yan-Biao; WANG Xiao; BAI Zhong

doi:10.1088/1674-1137/36/4/002

Chinese Physics C> 2012, Vol. 36> Issue(4) : 307-310 DOI: 10.1088/1674-1137/36/4/002

The decoherence of quantum entanglement and teleportation in Bell-diagonal states

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Abstract：
We study the dynamics of entanglement and teleportation in Bell-diagonal states. Using the concepts of concurrence and fidelity, the analytical expressions of the entanglement, the output entanglement and the average fidelity with decoherence are obtained for this model. We discover a class of initial states in which the output entanglement and the average fidelity are destroyed by decoherence. The quality of teleportation depends on the system parameters and time.

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[1]

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QIN Meng, LI Yan-Biao, WANG Xiao and BAI Zhong. The decoherence of quantum entanglement and teleportation in Bell-diagonal states[J]. Chinese Physics C, 2012, 36(4): 307-310. doi: 10.1088/1674-1137/36/4/002

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Received: 2011-07-19
Revised: 2011-09-21

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通讯作者: 陈斌, bchen63@163.com

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沈阳化工大学材料科学与工程学院沈阳 110142

The decoherence of quantum entanglement and teleportation in Bell-diagonal states

Received Date: 2011-07-19

Accepted Date: 2011-09-21

Available Online: 2012-04-05

Abstract: We study the dynamics of entanglement and teleportation in Bell-diagonal states. Using the concepts of concurrence and fidelity, the analytical expressions of the entanglement, the output entanglement and the average fidelity with decoherence are obtained for this model. We discover a class of initial states in which the output entanglement and the average fidelity are destroyed by decoherence. The quality of teleportation depends on the system parameters and time.

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The decoherence of quantum entanglement and teleportation in Bell-diagonal states

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