Quantum information science is a combination of quantum mechanics and information science,which transforms computing,coding,information processing and transmission process by the unique properties of quantum system,and develops new capabilities to process information more effi ciently.It mainly includes two fi elds,i.e.quantum computing and quantum communication.The core objective of quantum information science is to develop real-world quantum computers and achieve long-distance quantum communication with absolute safety[1].Current and future research focuses in quantum information science include quantum cryptography,quantum simulation and quantum measurement. Quantum information science is a combination of quantum mechanics and information science, which transforms computing, coding, information processing and transmission process by the unique properties of quantum systems, and develops new capabilities to process information more effi ciently. Mainly includes two fi elds, iequantum computing and quantum communication.The core objective of quantum information science is to develop real-world quantum computers and achieve long-distance quantum communication with absolute safety [1]. Current and future research focuses in quantum information science include quantum cryptography, quantum simulation and quantum measurement.