QDNN: DNN with Quantum Neural Network Layers
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The deep neural network (DNN) became the most important and powerful machine learning method in recent years. In this paper, we introduce a general quantum DNN, which consists of fully quantum structured layers with better representation power than the classical DNN and still keeps the advantages of the classical DNN such as the non-linear activation, the multi-layer structure, and the efficient backpropagation training algorithm. We prove that the quantum structured layer can not be simulated efficiently by classical computers unless universal quantum computing can be classically simulated efficiently and hence our quantum DNN has more representation power than the classical DNN. Moreover, our quantum DNN can be used on near-term noisy intermediate scale quantum (NISQ) processors. A numerical experiment for image classification based on quantum DNN is given, where high accurate rate is achieved.
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