The von Weizsacker Coefficient in Density Functional Theory

Abstract

For any given potential, linear response theory tells us the size that the von Weizsacker coefficient must assume in order to obtain the correct energy in the weak coupling limit. With this necessarily imposed choice, the quality of results is investigated as the coupling is strengthened. From the study of a number of model problems (the harmonic oscillator, the Yukawa well and the Mathieu potential) it is concluded that good results can be maintained to high couplings. © 1976, Verlag der Zeitschrift für Naturforschung. All rights reserved.