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Updated: Jun 24, 2025

Large Scale Energy Efficient Sensor Network Routing Using a Quantum Processor Unit

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Published on: September 8, 2023

QM-DLA: an efficient qubit mapping method based on dynamic look-ahead strategy.

Hui Liu^1,2, Bingjie Zhang^1,2, Yu Zhu^3,4

¹College of Computer and Information Engineering, Henan Normal University, Xinxiang, 453007, Henan, China.

Scientific Reports

|June 7, 2024

Summary

This summary is machine-generated.

This study introduces an optimized qubit mapping algorithm for quantum computing. It minimizes SWAP gates, reducing execution time and improving fidelity on Noisy Intermediate-Scale Quantum (NISQ) devices.

Keywords:

Dynamic look-ahead Quantum circuit Quantum computing Qubit mapping

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Area of Science:

Quantum Computing
Quantum Information Science

Background:

Noisy Intermediate-Scale Quantum (NISQ) devices have connectivity limitations.
Executing quantum algorithms on NISQ devices often requires SWAP gates, increasing execution time and reducing fidelity.

Purpose of the Study:

To propose an optimized qubit mapping algorithm to minimize SWAP gate insertions.
To enhance the execution of quantum algorithms on NISQ hardware.

Main Methods:

A heuristic algorithm maximizes physical qubit connectivity for initial mapping.
Directed acyclic graphs identify constraint violations, triggering SWAP gate insertion.
A multi-window look-ahead strategy optimizes SWAP gate placement.

Main Results:

The proposed algorithm significantly reduces the number of SWAP gates inserted.
A notable decrease in quantum circuit depth was achieved compared to existing methods.

Conclusions:

The optimized qubit mapping strategy effectively overcomes NISQ device limitations.
This approach enhances the feasibility and performance of quantum algorithms on current hardware.