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- W4379933249 abstract "The homogeneous electron gas (HEG) is a paradigmatic example of a many-electron quantum systems that has been used to model inhomogeneous electronic systems for nearly a century. Spin-polarized HEGs now form the foundation for almost all density functional approximations and, consequently, almost all electronic structure calculations. The present work introduces and explores a hitherto unexplored degree of freedom in HEGs, by considering ``constant occupation factor ensemble'' (cofe) gases involving excited states in a non-thermal quantum state ensemble. The properties of cofe HEGs are investigated in detail in this work, including kinetic, Hartree, exchange and correlation physics. Consideration is given to very recent [Phys. Rev. Lett. 130, 106401 (2023)] discoveries about the high- and low- density limits of electronic ground and excited states. Exact results are presented for kinetic, Hartree and exchange energies. A parametrization is also provided for correlation energies." @default.
- W4379933249 created "2023-06-09" @default.
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- W4379933249 date "2023-06-06" @default.
- W4379933249 modified "2023-09-28" @default.
- W4379933249 title "Homogeneous electron gases revisited through quantum state ensembles" @default.
- W4379933249 doi "https://doi.org/10.48550/arxiv.2306.04023" @default.
- W4379933249 hasPublicationYear "2023" @default.
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