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We propose a scheme to directly measure the exact value of geometric quantumdiscord of an arbitrary two-qubit state. We only need to perform the projectivemeasurement in the all anti-symmetric subspace and our scheme is parametricallyefficient in contrast to the widely adopted quantum state tomography scheme inthe sense of less parameter estimations and projectors. Moreover, the presentscheme can be easily realized with the current experimental techniques.

Direct scheme for measuring the geometric quantum discord