Fine-tuned Llama2-7b with text prompts predicts mean elastic constant components with MAE 2.32 GPa and R-squared 0.965, beating Darwin and MatTen on the same Materials Project dataset.
Mass density vs. energy density at cosmological scales
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abstract
In the presence of the gravitational field, the energy density of matter no longer coincides with its mass density. A discrepancy exists, of course, also between the associated power spectra. Within the $\Lambda$CDM model, we derive a formula that relates the power spectrum of the energy density to that of the mass density and test it with the help of N-body simulations run in comoving boxes of 2.816 Gpc/$h$. The results confirm the validity of the derived formula and simultaneously show that the power spectra diverge significantly from one another at large cosmological scales.
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Large Language Models for Material Property Predictions: elastic constant tensor prediction and materials design
Fine-tuned Llama2-7b with text prompts predicts mean elastic constant components with MAE 2.32 GPa and R-squared 0.965, beating Darwin and MatTen on the same Materials Project dataset.