Improving Quantum Classifier Performance in NISQ Computers by Voting Strategy from Ensemble Learning

• URL: http://arxiv.org/abs/2210.01656v3
• Date: Sat, 17 Dec 2022 21:08:42 GMT
• Title: Improving Quantum Classifier Performance in NISQ Computers by Voting Strategy from Ensemble Learning
• Authors: Ruiyang Qin, Zhiding Liang, Jinglei Cheng, Peter Kogge, and Yiyu Shi
• Abstract summary: Large error rates occur in quantum algorithms due to quantum decoherence and imprecision of quantum gates. In this study, we suggest that ensemble quantum classifiers be optimized with plurality voting.
• Score: 9.257859576573942
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: Due to the immense potential of quantum computers and the significant computing overhead required in machine learning applications, the variational quantum classifier (VQC) has received a lot of interest recently for image classification. The performance of VQC is jeopardized by the noise in Noisy Intermediate-Scale Quantum (NISQ) computers, which is a significant hurdle. It is crucial to remember that large error rates occur in quantum algorithms due to quantum decoherence and imprecision of quantum gates. Previous studies have looked towards using ensemble learning in conventional computing to reduce quantum noise. We also point out that the simple average aggregation in classical ensemble learning may not work well for NISQ computers due to the unbalanced confidence distribution in VQC. Therefore, in this study, we suggest that ensemble quantum classifiers be optimized with plurality voting. On the MNIST dataset and IBM quantum computers, experiments are carried out. The results show that the suggested method can outperform state-of-the-art on two- and four-class classifications by up to 16.0% and 6.1% , respectively.

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