The redefinition of the International System of Units makes the definitions of other base units directly or indirectly related to the unit of time (second) except that of the amount of substance. High-accuracy time and frequency standards plays an important role in national economy, national defense and scientific research. This paper mainly introduces the development of the definition of the second from astronomical second to atomic second, and the discussion on the redefinition of the second and the requirements for atomic clocks. Finally, it introduces the research work and counter measures of National Metrology Institute of China on time and frequency standards.
Quantum secure direct communication (QSDC) is one of the important forms of quantum communication, which refers to the technology of directly using quantum states as information carriers for secure communication. QSDC with the features of detecting eavesdropping while preventing eavesdropping. It is compatibility with existing optical communication networks, and thus no need to deploy additional encryption facilities. QSDC is naturally suitable for the transmission of information at high security levels. In this paper, we introduce the latest progress of QSDC in most recent years, and discuss the implementation characteristics of QSDC in the near-term. Finally, we provide an outlook on the direction of its application.
In recent years, new trials and expansions have been made in the application of quantum secure communication based on Quantum Key Distribution (QKD). In this paper, based on the progress and limitations of QKD in terms of transmission distance and key generation rate, we propose that quantum secure communication based on QKD can be divided into two modes: online distribution of quantum keys and online & offline combined distribution of quantum keys. The advantages and disadvantages of the two modes are analyzed, and the typical application scenarios of these two modes are introduced. The problems faced by QKD in terms of technology, equipment, networking, and network capability provision are discussed, and some solutions are proposed. The application of quantum secure communication is also closely related to the development of traditional encrypted communication services, systems and networks, and needs to be actively promoted by the industry chain.
Quantum computing is a research hotspot of quantum information technology. It has powerful parallel computing processing potential unmatched by classical computing, and has become the focus of all countries in the world to promote the layout of quantum information technology. This paper summarizes the latest research results and discusses technology development trends, and discusses the application and development of quantum computing in several scenarios.
Quantum walk is the analogy of classical random walk in the quantum world. It is a universal computing model and one of the key tools for designing efficient quantum algorithms and quantum information processing schemes. This paper briefly introduces the concepts and basic principles of quantum walk, expounds the key development nodes of quantum walk in search problems and other applications, and summarizes the prospect of quantum walk in the future.
This paper analyzes the general background of industrial change brought by photonic quantum computing, discusses the advantages of photonic quantum computing with relevant domestic and foreign policies and examples of company development, indicates that the development of photonic quantum computing technology is the key to solve the lack of arithmetic power in the post-Moore era, and cites the current applications of quantum computing in different industries.
Quantum computing is a candidate focus for advanced computing in the “post-Moore era.” Large-scale commercial quantum processors have not yet been broken through, and all parties are actively exploring future application models. Benchmarking technology is an important force to promote the development and application of the underlying hardware of quantum computing. This paper investigates and summarizes the research and development status of quantum computing benchmarking, and attempts to sort out and classify quantum computing benchmarking technology. Finally, the importance, problems and development trends of quantum computing benchmarks are analyzed and prospected.
This paper introduces the particle quantum lidar equipment based on the near-infrared single-photon detector and its application. The maximum detection distance of this equipment is 15 km, it takes only 8 minutes to complete a frame of 360-degree maps, which effectively solves the problem that traditional atmospheric lidar cannot accurately trace the source of dust in the field of environmental protection. This paper describes a quantum lidar monitoring network based on the equipment, which provides a systematic and practical solution for the real-time traceability of atmospheric particulate matter pollution sources, and looks forward to the development route of infrared quantum lidar in the future.
This article analyzes the current severe situation of personal information protection, studies the development and characteristics of personal information protection laws and policies, then analyzes the environment of personal information protection policies and regulations in China, and gives the framework and development direction of personal information protection standards.
The development of 5G, cloud computing, Artificial Intelligence (AI) makes the volume of data grew rapidly. With the demand for performance computing, heterogeneous computing develops rapidly. As reconfigurable chips, FPGA have new opportunities. The article introduces the development of FPGA in China and abroad,analyzes FPGA application scenarios based on distinguishing feature about flexibility, parallel processing and stream processing,and prospects for future development.
The urban-rural digital access gap has been basically eliminated, but the application gap is still significant. The level of digital skills of rural residents is low, the large difference in the ability of urban and rural residents to participate in digital activities and information consumption, has become a short board restricting the whole people to share the benefits of digital economy and realize the modernization of “people”,which may become a new threshold to widen the gap between urban and rural areas. International organizations and some developed countries attach great importance to digital skills cultivation, and have explored a set of digital skills cultivation system covering top-level design and specific measures, which has certain reference significance for improving China’s digital skills cultivation system. In the future, we need to accelerate digital skills cultivation strategy that covering the whole people, build a digital skills cultivation system with the participation of multiple subjects, build relative supporting courses and service system, and focus on special groups to provide effective digital skills training.
The problems and service requirements of the existing network prompts the innovation of the all-optical network. The OXC characteristics of super large capacity, ultra-low delay, flexible scheduling and intelligent management-control solve the transmission network problems of insufficient equipment capacity, inflexible scheduling and complex monitoring and control in the current network. Through innovative application, a transmission cloud architecture is proposed, which composed of optical layer resource pool and electrical layer resources in Greater Bay Area.
With the rapid development of data security industry, data security industry has been integrated into thousands of lines and hundreds of industries, data security industry patent layout has begun to take shape, this paper studies the status quo of data security patent development, focusing on key core technology branches of data security, clear patent development trend in the field of data security technology, It is concluded that the main body of data security patent application and management in China should pay attention to perfecting patent quality system, conducting patent analysis, optimizing technical field layout, strengthening basic patent traceability and retrieval, and forming joint force in core technology branches.
Since the users are the main body of the applications in Gigabit broadband networks, how to achieve high-quality user experience is vital for the network construction and performance optimization. This paper firstly analyzes the typical business applications in Gigabit broadband networks and the corresponding network capability requirements, then proposes suggestions on constructing broadband network to ensure high-quality experience, which provides an important reference for promoting the industrial development of Gigabit broadband networks.