Curing basis-set convergence of wave-function theory using density-functional theory: A systematically improvable approach
نویسندگان
چکیده
منابع مشابه
Accurate and systematically improvable density functional theory embedding for correlated wavefunctions.
We analyze the sources of error in quantum embedding calculations in which an active subsystem is treated using wavefunction methods, and the remainder using density functional theory. We show that the embedding potential felt by the electrons in the active subsystem makes only a small contribution to the error of the method, whereas the error in the nonadditive exchange-correlation energy domi...
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The forumulation of quantum mechanics in the early half of the twentith century gave the foundation for understanding the interactions between electrons and nuceli. However when an interacting system composed of many particles is considered the use of quantum mechanics is cumbersome. Very quickly the calculations are intractable by hand and even with the invention of computers these systems can...
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The basis set convergence of explicitly correlated double-hybrid density functional theory (DFT) is investigated using the B2GP-PLYP functional. As reference values, we use basis set limit B2GP-PLYP-F12 reaction energies extrapolated from the aug(')-cc-pV(Q+d)Z and aug(')-cc-pV(5+d)Z basis sets. Explicitly correlated double-hybrid DFT calculations converge significantly faster to the basis set ...
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ژورنال
عنوان ژورنال: The Journal of Chemical Physics
سال: 2018
ISSN: 0021-9606,1089-7690
DOI: 10.1063/1.5052714