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Simulating matter on the nanoscale with AI

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Simulating matter on the nanoscale with AI

by ITECHNEWS
December 10, 2021
in Data Science
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Simulating matter on the nanoscale with AI

In a paper published today in the scientific journal Science,DeepMind demonstrates how neural networks can be used to describe electron interactions in chemical systems more accurately than existing methods.

Density Functional Theory, established in the 1960s, describes the mapping between electron density and interaction energy. For more than 50 years, the exact nature of mapping between electron density and interaction energy—the so-called density functional—has remained unknown. In a significant advancement for the field, DeepMind has shown that neural networks can be used to build a more accurate map of the density and interaction between electrons than was previously attainable. 

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By expressing the functional as a neural network and incorporating exact properties into the training data, DeepMind was able to train the model to learn functionals free from two important systematic errors—the delocalisation error and spin symmetry breaking—resulting in a better description of a broad class of chemical reactions. 

In the short term, this will empower researchers with an improved approximation of the exact Density Functional for immediate use through the availability of our code. In the long term, it is another step showing deep learning’s promise in accurately simulating matter at the quantum mechanical level—which may enable material design in a computer by allowing researchers to explore questions about materials, medicines, and catalysts at the nanoscale level.

“Understanding technology at the nanoscale is becoming increasingly crucial in helping us tackle some of the major challenges of the 21st century, from clean electricity to plastic pollution,” says James Kirkpatrick, Research Scientist at DeepMind. “This research is a step in the right direction towards enabling us to better understand the interactions between electrons, the glue that holds molecules together.”

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