Abstract
We propose a deterministic scheme to realize four-atom and five-atom cluster state analyzers based on the cavity input–output process. In the scheme, we construct a multi-qubit parity analyzer and two cluster state phase analyzers and show that all the orthogonal multi-atom cluster states can be completely identified in a nondestructive way by combining these two kinds of analyzers. The fidelities of analyzers are also calculated, which show that our scheme has a high performance in the intermediate coupling region. Furthermore, the scheme opens promising perspectives for large-scale Bell-state-measurement-based and cluster-state-measurement-based quantum communication and quantum information processing networks.
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Acknowledgments
This work is supported by the National Natural Science Foundation of China under Grant Nos. 61068001 and 11264042; China Postdoctoral Science Foundation under Grant No. 2012M520612; and the Talent Program of Yanbian University of China under Grant No. 950010001.
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Zhu, L., Su, SL., Guo, Q. et al. Realization of nondestructive multi-atom cluster state analyzer via the cavity input–output process. Quantum Inf Process 12, 2749–2763 (2013). https://doi.org/10.1007/s11128-013-0556-2
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DOI: https://doi.org/10.1007/s11128-013-0556-2