关键词: 量子秘密共享, 纠缠态, 真多方纠缠, 六方态

Abstract: Entanglement is an important resource which can be applied in quantum information processing. Now, Bell states and GHZ states have been widely used in quantum secret sharing. The genuinely maximally entangled six-qubit state, which was discovered by Borras recently and called as Borras state, has been shown to exhibit some excellent characters in quantum teleportation. By analyzing the structure of Borras state and making generalized Schmidt decomposition, this paper constructs a concrete protocol of quantum secret sharing, in which Alice can share two bits among her agents, if she shares a Borras state with her four agents in advance (each agent has one qubit, and Alice has two qubits).

Key words: quantum secret sharing, entangled state, genuinely multipartite entanglement, six-qubit state