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论文类型：期刊论文

发表时间：2012-03-23

发表刊物：JOURNAL OF PHYSICS A-MATHEMATICAL AND THEORETICAL

收录刊物：SCIE、Scopus

卷号：45

期号：11

ISSN号：1751-8113

摘要：We propose a scheme to directly measure the exact value of the geometric quantum discord of an arbitrary two-qubit state. We need only to perform the projective measurement in all the anti-symmetric subspace and our scheme is parametrically efficient in contrast to the widely adopted quantum state tomography scheme in the sense of less parameter estimations and projectors. Moreover, the present scheme can be easily realized with the current experimental techniques.