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Quantum secret sharing via local operations and classical communication #MMPMID26586412
Yang YH; Gao F; Wu X; Qin SJ; Zuo HJ; Wen QY
Sci Rep 2015[]; 5 (ä): ä PMID26586412show ga
We investigate the distinguishability of orthogonal multipartite entangled states in d-qudit system by restricted local operations and classical communication. According to these properties, we propose a standard (2, n)-threshold quantum secret sharing scheme (called LOCC-QSS scheme), which solves the open question in [Rahaman et al., Phys. Rev. A, 91, 022330 (2015)]. On the other hand, we find that all the existing (k, n)-threshold LOCC-QSS schemes are imperfect (or ?ramp?), i.e., unauthorized groups can obtain some information about the shared secret. Furthermore, we present a (3, 4)-threshold LOCC-QSS scheme which is close to perfect.