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- W4226016095 abstract "We employ a generalized variational principle to improve the stability, reliability, and precision of fully excited-state-specific complete active space self-consistent field theory. Compared to previous approaches that similarly seek to tailor this ansatz's orbitals and configuration interaction expansion for an individual excited state, we find the present approach to be more resistant to root flipping and better at achieving tight convergence to an energy stationary point. Unlike state-averaging, this approach allows orbital shapes to be optimal for individual excited states, which is especially important for charge transfer states and some doubly excited states. We demonstrate the convergence and state-targeting abilities of this method in LiH, ozone, and MgO, showing in the latter that it is capable of finding three excited state energy stationary points that no previous method has been able to locate." @default.
- W4226016095 created "2022-05-05" @default.
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- W4226016095 date "2021-11-03" @default.
- W4226016095 modified "2023-09-30" @default.
- W4226016095 title "Applying generalized variational principles to excited-state-specific complete active space self-consistent field theory" @default.
- W4226016095 doi "https://doi.org/10.48550/arxiv.2111.02590" @default.
- W4226016095 hasPublicationYear "2021" @default.
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