Chinese Journal of Quantum Electronics ›› 2023, Vol. 40 ›› Issue (6): 952-962.doi: 10.3969/j.issn.1007-5461.2023.06.015

• Quantum Optics • Previous Articles     Next Articles

A computer⁃aided⁃design methodology for quantum circuit mapping based on stochastic optimization model

WEI Lihua1 , ZHU Pengcheng1,2*, GUAN Zhijin2   

  1. ( 1 Department of Information and Computing Science, Suqian University, Suqian 223800, China; 2 College of Information Science and Technology, Nantong University, Nantong 226019, China )
  • Received:2022-01-10 Revised:2022-04-09 Published:2023-11-28 Online:2023-11-28

Abstract: The limited connectivity between physical qubits is one of the most important constraints for noisy intermediate-scale quantum (NISQ) computing devices. Quantum circuit mapping makes all qubits in quantum circuits exchange mutually by inserting SWAP gates to satisfy the restricted connectivity constraints of physical devices. In a noisy computing environment, reducing the number of inserted SWAP gates is of great significance to improve the success rate of quantum computing. In order to minimize the number of SWAP gates, a heuristic quantum circuit mapping algorithm is proposed, and then based on the heuristic algorithm and the random search technology, a multi-iterative stochastic optimization model for quantum circuit mapping is proposed. The experimental results show that the method can greatly reduce the number of quantum gates inserted during the quantum circuit mapping process, and effectively reduce the dependence of the resulting physical circuit on the initial mapping.

Key words: quantum computing, quantum circuit mapping, noisy intermediate-scale quantum computing, limited connectivity, stochastic optimization

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