Quantum Communications and Information Science

Radhika Ranjan Roy

Quantum communication is a field of applied quantum physics closely related to quantum information processing and quantum teleportation. Quantum information science (QIS) [ 1 ] has been evolving rapidly in recent years in terms of quantum communications and quantum computing (QC). Its most interesting application is protecting information channels against eavesdropping by means of quantum cryptography. It is envisioned that QIS will enable and boost future 6G systems from both communication and computing perspectives. For example, secure quantum communications such as quantum key distribution (QKD) can be leveraged to improve 6G security. QIS mainly consists of four branches: quantum mechanics, QC, quantum communications, and quantum sensing (QS) and metrology. However, Quantum mechanics provides the theoretical foundations and building blocks for quantum communications, QC, and QS and metrology, as depicted in Figure 25.1 .

Zhou Xu-fen

The quantum information science is the science of quantum information processing technology. The quantum information processing technology includes quantum computing technology, quantum cryptography and quantum communication technologies,its impact on information security is great. The quantum computers and quantum algorithms made many difficult math problems solved easily, that is a direct threat to many of the traditional cryptography, and the anti-quantum attacks cryptographic algorithms became the focus of the theoretical research. Quantum cryptography and quantum teleportation can effectively improve the security of quantum communication networks and quantum signature technology. People encountered many challenges in the process of studying quantum information science,also made gratifying progress. People should adequately predict the impact of quantum informatics science on commercial, military, network,banking areas at the information age.