摘要
A tripartite scheme for securely sharing an arbitrary unknown two-qutrit state is proposed, where two generalized Greenberger-Horne-Zeilinger （GHZ） states serve as the quantum channel linking the three legitimate parties. The quantum information （i.e., the arbitrary unknown two-qutrit state） from the sender can be split in such a way that it can be reconstructed deterministically by any agent via a proper unitary operation provided that both agents collaborates together. Moreover, the generalization of the tripartite scheme to more-party case is also outlined.
基金
The project partly supported by the Program of New Century Excellent Talents at the Universities of China under Grant No.NCET06-0554
National Natural Science Foundation of China under Grant No.60677001
the Science-Technology Fund of Anhui Province for Outstanding Youth under Grant No.06042087
the Key Fund of the Ministry of Education of China under Grant No.206063
the General Fund of the Educational Committee of Anhui Province under Grant No.2006KJ260B
the Postgraduate Innovation Research Plan from Anhui University under Grant No.20073039
