Schemes for Splitting Quantum Information via Tripartite Entangled States

Abstract

In this paper we propose two schemes for quantum information splitting via tripartite entangled states. Explicit protocols for the quantum information splitting of a single qubit state and an arbitrary two-qubit entangled state are illustrated. We also consider the security against certain eavesdropping attacks. Moreover, a generalization of the scheme to multi-particle case is also outlined.

Asymmetric Quantum Information Splitting of an Arbitrary N-qubit State via GHZ-like State and Bell States

“…Through deep analysis and research, it can be found that some previous QIS ones exist severely redundancy for the controller to own more than one particle compared with this AQIS scheme. Moreover, the intrinsic efficiency for qubits of the AIQS scheme approaches 100% by reducing the redundant information, and the total efficiency really approaches the maximal value, which is higher than those of some previous QIS schemes [15].…”

“…However, it belongs to GHZ-class state rather than W-class state and it exists a potential symmetry. This state can be generated by a single photon and an EPR pair as follows [15]:…”

“…Generally speaking, the idea of QSS, in the literature, has been developed to the following three tasks: CC [11] (classical information is shared among parties by distributing QSS states through private secure channels, which are invulnerable to eavesdropping), CQ [9](classical information is shared among parties by distributing QSS states through public insecure channels, which are open for eavesdropping) and QQ [12][13][14][15][16][17][18](known as quantum state sharing or quantum information splitting, a secret quantum state is shared among parties by distributing QSS states through public channels). We consider the latter approach in the current paper.…”

“…Yang et al [14] have found a novel three-qubit GHZ-like state in experimental and demonstrated an arbitrary single-qubit state QIS based on Z basis measurement via it among three-party. Meanwhile, Zhang et al [15] have also designed a similar three-party QIS of an arbitrary n-qubit state by using n sets of GHZ-like states as quantum information carrier. Recently, many-party QIS schemes of an arbitrary unknown quantum states have been investigated [16][17][18].…”

“…[14,15,22,23], in this manuscript we firstly investigate the AQIS scheme of an arbitrary two-qubit state among three participants by using the maximally entangled states, which are made up of a three-qubit entangled GHZ-like state and a Bell state, as quantum information carrier, instead of multi-qubit entangled states. Different from most previous QIS ones, our scheme is claimed an asymmetrical quantum information splitting since that the number of the particles owned by each agent in the secure quantum channel is not necessarily equal except that the quantum information of the receiver is designated in advance.…”