Wireless Quantum Communication Network Research Based On Partially Entangled State

Because of its safety and efficiency, quantum communication has become one of the frontier research fields. Combined the quantum communication technology with wireless network technology, it brings a flexible, high-speed, safe, high-capacity way for wireless communication, and it’s adapted to the dynamic and open network environment.This paper studies the wireless quantum communication network research based on partially entangled state. Based on the partially entangled quantum network model, the distribution rates of quantum entangled states are analyzed. Two quantum transmission schemes are proposed, including bridging transmission scheme based on two particle partially entangled states source, and quantum teleportation scheme based on partially entanglements plus W state quantum resource are proposed. Based on the properties of transmission schemes, two different communication routing protocols in wireless quantum network are designed.Firstly, quantum communication network node distribution, node functions, node communication are defined. Combined with the percolation theory, the overall characteristics of the network are analyzed assuming that the quantum network tends to be infinity huge and the node density is more than a threshold. According to the quantum highway concept, the quantum channel establishing rate of arbitrary two nodes in the network is then analyzed, including the basic link, different long relay links, and quantum channel establishing rate of two long-distant nodes in the large-scale network as the node number t turns to be infinity. We conclude that the quantum channel establishing rate in a quantum communication network of t nodes isΩ(1/t)The teleportation characteristics of two-particle partially entangled quantum states are then analyzed, and two new transmission schemes are proposed:two-particle partially entanglement quantum bridging scheme and the teleportation scheme based on two-particle partially entangled state and three-particle entangled quantum W state. The first scheme realizes the parallel execution of quantum circuits and classical information asynchronous transmission between each nodes. The second scheme increases the success probability of traditional double W state transmission scheme by introducing an auxiliary particle.Finally, according to the two different partially entangled quantum states teleportation scheme above, two quantum network communication routing protocols are designed. Each routing protocol is composed by the basic control packets, quantum routing discovery and maintenance process, and corresponding routing examples are presented.