Hohenberg-Kohn theorem for the lowest-energy resonance of unbound systems
arXiv:cond-mat/0612284 · doi:10.1103/PhysRevLett.98.093003
Abstract
We show that under well-defined conditions the Hohenberg-Kohn theorem (HKT) can be extended to the lowest-energy resonance of unbound systems. Using the Gel'fand Levitan theorem, the extended version of the HKT can also be applied to systems that support a finite number of bound states. The extended version of the HKT provides an adequate framework to carry out DFT calculations of negative electron affinities.
4 pages, 3 figures