Abstract Quantum teleportation via the entangled channel composed of a two-qubit Heisenberg XYZ model with Dzyaloshinski--Moriya (DM) interaction in the presence of intrinsic decoherence has been investigated. We find that the initial state of the channel plays an important role in the teleported state and the average fidelity of teleportation. When the initial channel is in the state $|\psi_1(0)\rangle=a|00\rangle+b|11\rangle$, the average fidelity is equal to 1/3 constantly, which is independent of the DM interaction and the intrinsic decoherence effect. But when the channel is initially in the state $|\psi_2(0)\rangle =c|01\rangle +d|10\rangle$, the average fidelity is always larger than 2/3. Moreover, under a certain condition, the average fidelity can be enhanced by adjusting the DM interaction, and the intrinsic decoherence leads to a suppression of the fluctuation of the average fidelity.
Received: 06 July 2008
Revised: 15 August 2008
Accepted manuscript online:
PACS:
03.67.Lx
(Quantum computation architectures and implementations)
(Decoherence; open systems; quantum statistical methods)
Fund: Project supported by the National
Natural Science Foundation of China (Grant Nos 60708003, 60578050
and 10434060), the National Basic Research Program of China (Grant
No 2006CB921604), the Shanghai Science and Technology Committee
(Grant No 07JC14017), an
Cite this article:
Hu Xiao-Mian(胡小勉) and Liu Jin-Ming(刘金明) Effects of Dzyaloshinski--Moriya interaction and intrinsic decoherence on teleportation via a two-qubit Heisenberg XYZ model 2009 Chin. Phys. B 18 411
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