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Quantum Entanglement Channel based on Excited States in a Spin Chain |
| ZHANG Shao-Liang, DU Liang-Hui, GUO Guang-Can, ZHOU Xing-Xiang**, ZHOU Zheng-Wei**
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Key Laboratory of Quantum Information, University of Science and Technology of China, Hefei 230026
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| Cite this article: |
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ZHANG Shao-Liang, DU Liang-Hui, GUO Guang-Can et al 2011 Chin. Phys. Lett. 28 120301 |
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Abstract We study the possibility of using a spin chain to construct a quantum entanglement channel that can be used for quantum state transmission in a solid state system. We analyze the spin chain's states under various z-directional magnetic field and spin interactions to determine the entanglement between Alice and Bob's spins. We derive the conditions under which this entanglement can be distilled, and find that a spin chain of arbitrary length can be used as a quantum channel for quantum state transmission when the number of spin flips in the chain is large.
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| Keywords:
03.65.Ud
42.50.Ex
75.10.Pq
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Received: 15 May 2011
Published: 29 November 2011
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| PACS: |
03.65.Ud
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(Entanglement and quantum nonlocality)
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42.50.Ex
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(Optical implementations of quantum information processing and transfer)
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75.10.Pq
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(Spin chain models)
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