title: Efficient quantum transmission in multiple-source networks.
abstract: A difficult problem in quantum network communications is how to efficiently transmit quantum information over large-scale networks with common channels. We propose a solution by developing a quantum encoding approach. Different quantum states are encoded into a coherent superposition state using quantum linear optics. The transmission congestion in the common channel may be avoided by transmitting the superposition state. For further decoding and continued transmission, special phase transformations are applied to incoming quantum states using phase shifters such that decoders can distinguish outgoing quantum states. These phase shifters may be precisely controlled using classical chaos synchronization via additional classical channels. Based on this design and the reduction of multiple-source network under the assumption of restricted maximum-flow, the optimal scheme is proposed for specially quantized multiple-source network. In comparison with previous schemes, our scheme can greatly increase the transmission efficiency.
authors.affiliation: 1] Information Security and National Computing Grid Laboratory, Southwest Jiaotong University, Chengdu 610031, China [2] State Key Laboratory of Networking and Switching Technology, Beijing University of Posts and Telecommunications, Beijing 100876, China [3] State Key Laboratory of Information Security (Graduate University of Chinese Academy of Sciences), Beijing 100049, China.
authors.forename: Ming-Xing
authors.initials: MX
authors.lastname: Luo
authors.affiliation: 1] State Key Laboratory of Networking and Switching Technology, Beijing University of Posts and Telecommunications, Beijing 100876, China [2] School of Software Engineering, Beijing University of Posts and Telecommunications, Beijing 100876, China.
authors.forename: Gang
authors.initials: G
authors.lastname: Xu
authors.affiliation: State Key Laboratory of Networking and Switching Technology, Beijing University of Posts and Telecommunications, Beijing 100876, China.
authors.forename: Xiu-Bo
authors.initials: XB
authors.lastname: Chen
authors.affiliation: State Key Laboratory of Networking and Switching Technology, Beijing University of Posts and Telecommunications, Beijing 100876, China.
authors.forename: Yi-Xian
authors.initials: YX
authors.lastname: Yang
authors.affiliation: School of Electronic Engineering, Dublin City University, Dublin 9, Ireland.
authors.forename: Xiaojun
authors.initials: X
authors.lastname: Wang