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Eliminating Next-Nearest-Neighbor Interactions in the Preparation of Cluster State |
| ZHANG Ji-Ying, ZHOU Zheng-Wei**, GUO Guang-Can
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| Key Laboratory of Quantum Information, University of Science and Technology of China, Chinese Academy of Sciences, Hefei 230026 |
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| Cite this article: |
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ZHANG Ji-Ying, ZHOU Zheng-Wei, GUO Guang-Can 2011 Chin. Phys. Lett. 28 050301 |
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Abstract By analyzing recent schemes for preparing the chain cluster state, we find that the existence of long-range couplings between qubits will induce a quick decay of the fidelity of the cluster state. We propose some schemes for eliminating the effect of the next-nearest-neighbor interactions in the XY and Ising models by dynamical decoupling method. In our approach, the undesired next-nearest-neighbor interactions are effectively suppressed and the fidelity of the generated cluster state is greatly improved by the pulse operations.
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| Keywords:
03.67.Pp
03.67.Lx
03.67.-a
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Received: 22 November 2010
Published: 26 April 2011
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| PACS: |
03.67.Pp
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(Quantum error correction and other methods for protection against decoherence)
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03.67.Lx
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(Quantum computation architectures and implementations)
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03.67.-a
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(Quantum information)
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