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Training a neural network with exciton-polariton optical nonlinearity (2107.11156v2)

Published 23 Jul 2021 in cs.LG, cond-mat.dis-nn, and cond-mat.quant-gas

Abstract: In contrast to software simulations of neural networks, hardware implementations have often limited or no tunability. While such networks promise great improvements in terms of speed and energy efficiency, their performance is limited by the difficulty to apply efficient training. We propose and realize experimentally an optical system where highly efficient backpropagation training can be applied through an array of highly nonlinear, non-tunable nodes. The system includes exciton-polariton nodes realizing nonlinear activation functions. We demonstrate a high classification accuracy in the MNIST handwritten digit benchmark in a single hidden layer system.

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