| Biography | |
|---|---|
 Prof. Zhijin Guan Nantong University, China |
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| Title: A mapping and optimization strategy for Clifford+T quantum circuits | |
| Abstract: Several quantum computers realized by the Noisy Intermediate-Scale Quantum (NISQ) technology have been released in the past few years. It is a significant advancement of quantum computing, we are expected to use quantum computers to solve practical problems in the near future. However, there exists a significant limitation to use such computers, i.e., the coupling constraint between physical qubits. To perform a 2-quibit quantum operation on these NISQ computers, its two logical qubits have to be mapped to a pair of physical qubits that satisfy the coupling constraint. This mapping procedure introduces additional operations and reduces the fidelity of the quantum circuit, so it is of great significance to design an algorithm that is able to complete the mapping task with minimal additional operations. In order to solve the problem of quantum circuit fault tolerance and reliability, the quantum circuit of NCV gate library is mapped to Clifford+T circuit. In this paper a series of structural equivalence rules and optimization operation strategies of quantum circuit are proposed to minimize the number of T gates, increase T gate depth, simplify circuit hierarchy, reduce quantum circuit fault tolerance implementation costs and increase circuit reliability. In order to satisfy the constraints of some quantum system neighbors, a CNOT gate neighbor algorithm based on Clifford+T gate quantum circuit is presented. The test is carried out by using the partial part function of RevLib. The results show that the optimization results of most functions and the running time of the algorithm are better than those of the existing literature. | |
| Biography: Zhijin Guan is Professor of School of Information Science and Technology, Nantong University. He holds Ph.D. from Nanjing University of Aeronautics and Astronautics of Computer Application Technology, China. He was Senior member of China Computer Society (CCF), Standing Committee Member of Information Security Committee of Jiangsu Computer Society, Member of Artificial Intelligence Committee of Jiangsu Computer Society and Chief Science and Technology Communication Expert of Jiangsu Province. He is editor / associate / member of editorial boards of several scientific journals. He has over 150 publications, including five books. In recent years, His team has implemented a large-scale quantum/reversible logic gate cascade reversible circuit, and constructed a quantum/reversible circuit logic synthesis platform. A 16-bit/12 instruction reversible processor (CPU) based on quantum logic is implemented by using electronic circuits. The encryption technology based on quantum logic circuits is realized. A series of research works such as a Java-based reversible language compiler is implemented. | |
