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- W2912248965 abstract "Site-occupation embedding theory (SOET) [B. Senjean et al., Phys. Rev. B 97, 235105 (2018)] is an in-principle exact embedding method combining wavefunction theory and density functional theory that gave promising results when applied to the one-dimensional Hubbard model. Despite its overall good performance, SOET faces a computational cost problem as its auxiliary impurity-interacting system remains the size of the full system (which is problematic as the computational cost increases exponentially with system size). In this work, this issue is circumvented by employing the Schmidt decomposition, thus leading to a drastic reduction of the computational cost while retaining the same accuracy. We show that this projected version of SOET (P-SOET) is competitive with other embedding techniques such as density matrix embedding theory (DMET) [G. Knizia and G. K-L. Chan, Phys. Rev. Lett. 109, 186404 (2012)]. In contrast to the latter, density functional contributions come naturally into play in P-SOET's framework without any additional computational cost or double counting effect. As an important result, the density-driven Mott-Hubbard transition (which is displayed by multiple impurity sites in DMET or in dynamical mean-field theory) is well described, for the first time, with a single impurity site." @default.
- W2912248965 created "2019-02-21" @default.
- W2912248965 creator A5004062752 @default.
- W2912248965 date "2019-07-30" @default.
- W2912248965 modified "2023-10-18" @default.
- W2912248965 title "Projected site-occupation embedding theory" @default.
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- W2912248965 doi "https://doi.org/10.1103/physrevb.100.035136" @default.
- W2912248965 hasPublicationYear "2019" @default.
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