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cond-mat.str-el2018★ 39 cited
Linear response time-dependent density functional theory of the Hubbard dimer
D. J. Carrascal, J. Ferrer, N. Maitra +1
The asymmetric Hubbard dimer is used to study the density-dependence of the exact frequency-dependent kernel of linear-response time-dependent density functional theory. The exact…
cond-mat.str-el2015★ 104 cited
The Hubbard Dimer: A density functional case study of a many-body problem
Diego Carrascal, Jaime Ferrer, Justin C. Smith +1
This review explains the relationship between density functional theory and strongly correlated models using the simplest possible example, the two-site Hubbard model. The relation…
cond-mat.str-el2011★ 30 cited
Exact Kohn-Sham eigenstates versus quasiparticles in simple models of strongly correlated electrons
D. J. Carrascal, J. Ferrer
We present analytic expressions for the exact density functional and Kohn-Sham Hamiltonian of simple tight-binding models of correlated electrons. These are the single- and double-…