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国家自然科学基金(s10404007)

作品数:2 被引量:1H指数:1
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Proof of the insecurity of quantum secret sharing based on the Smolin bound entangled states
2009年
This paper reconsiders carefully the possibility of using the Smolin bound entangled states as the carrier for sharing quantum secret. It finds that the process of quantum secret sharing based on Smolin states has insecurity though the Smolin state was reported to violate maximally the two-setting Bell-inequlity. The general proof is given.
於亚飞张智明
Deterministic quantum teleportation and information splitting via a peculiar W-class state被引量:1
2010年
In the paper (Phys. Rev. 2006 A 4 062320) Agrawal et al. have introduced a kind of W-class state which can be used for the quantum teleportation of single-particle state via a three-particle von Neumann measurement, and they thought that the state could not be used to teleport an unknown state by making two-particle and one-particle measurements. Here we reconsider the features of the W-class state and the quantum teleportation process via the W-class state. We show that, by introducing a unitary operation, the quantum teleportation can be achieved deterministically by making two-particle and one-particle measurements. In addition, our protocol is extended to the process of teleporting two-particle state and splitting information.
梅锋於亚飞张智明
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