Papers › Quantum Chemical Density Matrix Renormalization Group Method Boosted by Machine Learning
Quantum Chemical Density Matrix Renormalization Group Method Boosted by Machine Learning
Pavlo Golub, Chao Yang, Vojtěch Vlček, Libor Veis
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Accurate electronic structure calculations are essential in modern materials science, but strongly correlated systems pose a significant challenge due to their computational cost. Traditional methods, such as complete active space self-consistent field (CASSCF), scale exponentially with system size, while alternative methods like the density matrix renormalization group (DMRG) scale more favorably, yet remain limited for large systems. In this work, we demonstrate how a simple machine learning model can enhance quantum chemical DMRG calculations, improving their accuracy to chemical precision, even for systems that would otherwise require considerably higher computational resources. The systems under study are polycyclic aromatic hydrocarbons, which are typical candidates for DMRG calculations and are highly relevant for advanced technological applications.
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