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- W4287352848 abstract "We present a Flexible Ansatz for N-body Configuration Interaction (FANCI) that includes any multideterminant wavefunction. This ansatz is a generalization of the Configuration Interaction (CI) wavefunction, where the coefficients are replaced by a specified function of certain parameters. By making an appropriate choice for this function, we can reproduce popular wavefunction structures like CI, Coupled-Cluster, Tensor Network States, and geminal-product wavefunctions. The universality of this framework suggests a programming structure that allows for the easy construction and optimization of arbitrary wavefunctions. Here, we will discuss the structures of the FANCI framework and its implications for wavefunction properties, particularly accuracy, cost, and size-consistency. We demonstrate the flexibility of this framework by reconstructing popular wavefunction ans{a}tze and modifying them to construct novel wavefunction forms. FANCI provides a powerful framework for exploring, developing, and testing new wavefunction forms." @default.
- W4287352848 created "2022-07-25" @default.
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- W4287352848 date "2021-02-01" @default.
- W4287352848 modified "2023-09-24" @default.
- W4287352848 title "Flexible ansatz for N-body Configuration Interaction" @default.
- W4287352848 doi "https://doi.org/10.48550/arxiv.2102.01171" @default.
- W4287352848 hasPublicationYear "2021" @default.
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