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- W2006374962 abstract "Variational reduced-density-matrix theory is applied to calculating the ground-state energy and two-electron reduced density matrices (2-RDMs) of the one-dimensional Hubbard model for a range of interaction strengths. The 2-RDM is constrained to represent an $N$-particle wave function by two sets of $N$-representability conditions, known as the 2- and partial 3-positivity conditions. Variational optimization of the energy with the 2-RDM constrained by $N$-representability conditions is performed using a first-order semidefinite-programming algorithm that was developed for treating atoms and molecules [D. A. Mazziotti, Phys. Rev. Lett. 93, 213001 (2004)]. Accurate energies for a broad range of interaction strengths indicate that the variational 2-RDM method is a valuable tool for studying strongly correlated electrons." @default.
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- W2006374962 date "2006-06-13" @default.
- W2006374962 modified "2023-10-14" @default.
- W2006374962 title "Variational reduced-density-matrix calculation of the one-dimensional Hubbard model" @default.
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- W2006374962 doi "https://doi.org/10.1103/physreva.73.062505" @default.
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