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Title Recent Advances in Qubit Allocation Algorithm for NISQ Architectures
Authors (Sengthai Heng) ; (Taekyung Kim) ; (Youngsun Han)
DOI https://doi.org/10.5573/IEIESPC.2021.10.3.240
Page pp.240-249
ISSN 2287-5255
Keywords Qubit mapping; Noisy intermediate scale quantum (NISQ) computer; Quantum circuit
Abstract In recent years, the advancement of quantum computers has been improving, with its use increasing in practical applications, including noisy intermediate-scale quantum (NISQ) technology. However, an obstacle that limits quantum computer usage is the connectivity restriction between logical and physical qubits. For performing quantum entanglement on NISQ machines, two logical qubits must be mapped to physical qubit pairs that much up to the connectivity constraint. This mapping process must insert additional operations into an initial quantum circuit. Many powerful algorithms have been proposed to solve the mapping problem, which also mitigate circuit size or depth and improve the fidelity of the quantum state. In this review paper, we present various studies for solving qubit mapping or allocation problems and analyze their time complexity and methods.