Quantum state sharing of an arbitrary two-qubit state with two-photon entanglements and Bell-state measurements

Abstract

Two schemes for sharing an arbitrary two-qubit state based on entanglement swapping are proposed with Bell-state measurements and local unitary operations. One is based on the quantum channel with four Einstein-Podolsky-Rosen (EPR) pairs shared in advance. The other is based on a circular topological structure, i.e., each user shares an EPR pair with his neighboring one. The advantage of the former is that the construction of the quantum channel between the agents is controlled by the sender Alice, which will improve the security of the scheme. The circular scheme reduces the quantum resource largely when the number of the agents is large. Both of those schemes have the property of high efficiency as almost all the instances can be used to split the quantum information. They are more convenient in application than the other schemes existing as they require only two-qubit entanglements and two-qubit joint measurements for sharing an arbitrary two-qubit state.

6 pages, 2 figures; It is a supplement for quant-ph/0504158 and simplify the measurements in the latter. Moreover, it reduecs the quantum resource largely when the number of the agents is large, compared with quant-ph/0504158

References in corpus (7)

• Secure Direct Communication with a Quantum One-Time-Pad
• Efficient Multi-Party Quantum Secret Sharing Schemes
• Multiparty Quantum Secret Sharing
• Multiparty quantum state sharing of an arbitrary two-particle state with Einstein-Podolsky-Rosen pairs
• Symmetric multiparty-controlled teleportation of an arbitrary two-particle entanglement
• Multiparty Quantum Secret Sharing Based on Entanglement Swapping
• Quantum secret sharing between multi-party and multi-party without entanglement

Cited by in corpus (22)

• Improving the security of secure direct communication based on secret transmitting order of particles
• Efficient polarization entanglement purification based on parametric down-conversion sources with cross-Kerr nonlinearity
• Nonlocal entanglement concentration scheme for partially entangled multipartite systems with nonlinear optics
• Efficient single-photon-assisted entanglement concentration for partially entangled photon pairs
• Efficient two-step entanglement concentration for arbitrary W states
• Circular quantum secret sharing
• Efficient high-capacity quantum secret sharing with two-photon entanglement
• Efficient multipartite entanglement purification with the entanglement link from a subspace
• Controlled Teleportation of an Arbitrary Multi-Qudit State in a General Form with d-Dimensional Greenberger-Horne-Zeilinger States
• Photonic spatial Bell-state analysis for robust quantum secure direct communication using quantum dot-cavity systems
• Multiparty quantum secret sharing with pure entangled states and decoy photons
• Multipartite entanglement purification with quantum nondemolition detectors
• Experimentally Feasible Security Check for n-qubit Quantum Secret Sharing
• Minimal classical communication and measurement complexity for quantum information splitting
• Multipartite electronic entanglement purification with charge detection
• Efficient and economic five-party quantum state sharing of an arbitrary m-qubit state
• Single-photon-assisted entanglement concentration of a multi-photon system in a partially entangled W state with weak cross-Kerr nonlinearity
• Quantum secret sharing between m-party and n-party with six states
• Eavesdropping on the "Ping-Pong" Quantum Communication Protocol Freely in a Noise Channel
• Multiparty Quantum Remote Secret Conference
• Dissipative entanglement swapping in the presence of detuning and Kerr medium: Bell state measurement method
• Entanglement Swapping Between Dissipative Systems