摘要：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.
