The paper establishes an exact N-centered ensemble DFT formalism unifying neutral and charged excitations and introduces three practical strategies: weight-dependent scaling of ground-state functionals, quasi-degenerate ensemble perturbation theory, and quantum bath embedding for excited states.
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physics.chem-ph 2years
2026 2verdicts
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Review summarizing theoretical foundations, recent algorithmic advances, open-shell singlet treatments, transition properties, and applications of orbital-optimized DFT to Rydberg, charge-transfer, and core excitations.
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Ensemble density functional theory of excited states: Exact N-centered formalism and practical opportunities
The paper establishes an exact N-centered ensemble DFT formalism unifying neutral and charged excitations and introduces three practical strategies: weight-dependent scaling of ground-state functionals, quasi-degenerate ensemble perturbation theory, and quantum bath embedding for excited states.
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Orbital-optimized density functional calculations of excited electronic states: Recent advances and perspectives
Review summarizing theoretical foundations, recent algorithmic advances, open-shell singlet treatments, transition properties, and applications of orbital-optimized DFT to Rydberg, charge-transfer, and core excitations.