Exchange-correlation orbital functionals in current-density-functional theory: Application to a quantum dot in magnetic fields
N. Helbig, S. Kurth, S. Pittalis, E. Räsänen, E. K. U. Gross
Abstract
The description of interacting many-electron systems in external magnetic fields is considered in the framework of the optimized effective potential method extended to current-spin-density functional theory. As a case study, a two-dimensional quantum dot in external magnetic fields is investigated. Excellent agreement with quantum Monte Carlo results is obtained when self-interaction corrected correlation energies from the standard local spin-density approximation are added to exact-exchange results. Full self-consistency within the complete current-spin-density-functional framework is found to be of minor importance.
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