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论文类型：期刊论文

发表时间：2011-03-14

发表刊物：PHYSICAL REVIEW A

收录刊物：Scopus、SCIE、EI

卷号：83

期号：3

ISSN号：1050-2947

摘要：We propose a scheme for identifying an unknown Bell diagonal state. In our scheme the measurements are performed on the probe qubits instead of the Bell diagonal state. The distinct advantage is that the quantum state of the evolved Bell diagonal state ensemble plus probe states will still collapse on the original Bell diagonal state ensemble after the measurement on probe states; i.e., our identification is quantum state nondestructive. How to realize our scheme in the framework of cavity electrodynamics is also shown.