Journal
QUANTUM INFORMATION PROCESSING
Volume 19, Issue 3, Pages -Publisher
SPRINGER
DOI: 10.1007/s11128-020-2587-9
Keywords
Quantum machine learning; Quantum neural networks; Variational algorithm
Funding
- CSIR [09/086(1203)/2014-EMR-I]
- Department of Science and Technology INSPIRE Faculty Award
- Science and Engineering Research Board Early Career Research (ECR) award
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We propose a quantum classifier, which can classify data under the supervised learning scheme using a quantum feature space. The input feature vectors are encoded in a single quNit (a N-level quantum system), as opposed to more commonly used entangled multi-qubit systems. For training, we use the much used quantum variational algorithm-a hybrid quantum-classical algorithm, in which the forward part of the computation is performed on a quantum hardware, whereas the feedback part is carried out on a classical computer. We introduce single-shot training, where all input samples belonging to the same class are used to train the classifier simultaneously. This significantly speeds up the training procedure and provides an advantage over classical machine learning classifiers. We demonstrate successful classification of popular benchmark datasets with our quantum classifier and compare its performance with respect to classical machine learning classifiers. We also show that the number of training parameters in our classifier is significantly less than the classical classifiers.
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