Nowadays, with the continuous progress of science and technology, the role of quantum computers has received more attention and gradually become a part of national strategies. Many countries, such as the United States, China, and Japan, have invested a lot of resources in research and development, striving to make breakthroughs and take the lead in this field, in order to meet the coming of the future computing era. Superconducting quantum computers are the most widely used computers at the moment. Based on the introduction of Josephson junction, the physical principle of superconducting quantum computers, this paper analyses the advantages and disadvantages of multiple quantum bits as well as the algorithms of various quantum gates in superconducting quantum computers. Moreover, the author also looks forward to the development of the related technologies of superconducting quantum computers. Finally, corresponding suggestions are put forward for some current problems.
Nowadays, with the continuous progress of science and technology, the role of quantum computers has received more attention and gradually become a part of national strategies. Many countries, such as the United States, China, and Japan, have invested a lot of resources in research and development, striving to make breakthroughs and take the lead in this field, in order to meet the coming of the future computing era. Superconducting quantum computers are the most widely used computers at the moment. Based on the introduction of Josephson junction, the physical principle of superconducting quantum computers, this paper analyses the advantages and disadvantages of multiple quantum bits as well as the algorithms of various quantum gates in superconducting quantum computers. Moreover, the author also looks forward to the development of the related technologies of superconducting quantum computers. Finally, corresponding suggestions are put forward for some current problems.
Abstract Nowadays the quantum computer has been drawing public attention, and how to realize a quantum computer is one of the difficult problems. However, superconducting circuit is a good system for solving the physics of quantum computers, as it has a solid development history and a perfect fit with quantum computers. In this paper, the development history of the superconducting quantum computer will be reviewed. In addition, the Josephson junction is the basis of superconducting quantum computation, based on which as well as in combination with DiVincenzo’s five requirements, superconducting quantum computers have a great potential. For the main part, the advantages and disadvantages of superconducting a quantum computer are analyzed. Some suggestions are also given and the future of superconducting computer is predicted. In conclusion, the superconducting system is found to be a suitable system for quantum computers.
Abstract With the rapid development of science and technology, people tend to have a higher demand for computing. Classical computers can no longer meet part of the computing needs, so quantum information systems have gained more and more attention. Quantum computers have good parallelism, fast information processing speed, large amount of information storage, and performance in many fields far surpasses classical computers. In this article, the author introduces coherent superposition and part of quantum gates and quantum algorithms meanwhile compares classical computers with quantum computers in many aspects. The advantages and disadvantages of quantum computers in principle are also drawn out. Finally, the author proposes future prospects for quantum computers prediction.
Superconducting circuits based on Josephson junctions are regarded as one of the most promising technologies for the implementation of scalable quantum computers. This review presents the basic principles of superconducting qubits and shows the progress of quantum computing and quantum simulation based on superconducting qubits in recent years. The experimental realization of gate operations, readout, error correction codes, as well as some quantum algorithms are summarized, followed by an introduction of quantum simulation. And then some important applications in fields including condensed matter physics, quantum annealing, and quantum chemistry are discussed.
Quantum computing continues to make great progress, impacting not only the theory of computer science but also technological innovations. This chapter gives an overview of the subject matter, presenting the current state-of-the-art in qubit architectures, quantum algorithms, hardware achievements made since 2019 through 2024, potential applications, and difficulties ahead for wide-scale implementation. Utilizing the latest results of research and innovation efforts conducted by top industry leaders, the chapter covers topics such as the comparison of superconducting, trapped ion, neutral atom, photonic, and topological qubits, quantum algorithms, applicability in various industries like cryptography, optimization, material sciences, and artificial intelligence, and the advancement of quantum error correction and fault-tolerant computing. Finally, the chapter takes a closer look at prevalent myths associated with near-term quantum advantage and focuses on true developments in quantum hardware and logical qubits.
Quantum computation, as part of the broader field of quantum information, represents an assembly of concepts and techniques that concern the nature and processing of information based on quantum mechanics. Quantum computation utilizes unique resources such as quantum superposition and quantum entanglement to encode and process information and has been proved to be dominantly advantageous over classical computation on certain important scientific and engineering problems. Potential applications of quantum computation are expected to influence future information technology and many other related fields deeply and significantly. In this article, we briefly review the history of quantum computation, including how its fundamental ideas and concepts came into being and the development of its significant theories and algorithms. We also discuss the status and outlook of several representative technical routes in this field, including superconducting quantum computation, distributed superconducting quantum computation, photonic quantum computation, trapped-ion quantum computation, silicon-based quantum computation, as well as other systems. Furthermore, by analyzing certain common issues faced by all routes, we propose some thoughts and suggestions for future development of quantum computation in China. We particularly emphasize the following: reinforcement of strategic planning at a national level, establishment of a research team of high caliber, and boost of relevant fundamental research and development of core techniques and critical instruments.
Abstract. While human progress in the world of electronics, computers and computing is undeniable, new researches show that we can achieve greater speed and lower power consumption based on the principles of quantum physics. Changing from the digital world of today, which is based on CMOS transistors and the electric current, to quantum with no electric current and based on magnetic flux, is now in the middle of its way. Clearly any research in this area or even a comprehensive scientific attention is laudable from the experts’ viewpoint. This paper tries to show quantum computers more tangible by describing and analyzing some basic principles and explaining the entrance to this technology. In this article it is explained how the spintronics, superconductivity, and Josephson junction open the ways to the next generation of faster, more compact, and more energy-efficient computers in future; computers that bring about several hundred times the speed and negligible power consumption, along with the revolution of basic principles of electronics. We'll see how the spin transistors transfer data in lower speed and volume, using the electron spin direction to be high or low, or how the superconductivity, which is the key to the future supercomputers, solve the problem of supercomputers power consumption using technologies such as RSFQ.