Title 



Differential equation for the determination of a firstdegree homogeneous noninteracting kineticenergy density functional for twolevel systems


Author 





Abstract 



A differential equation from which the noninteracting kinetic energy density of onedimensional twoparticle (or twolevel spherically symmetric closedshell) systems can be obtained in terms of the groundstate density is derived. In this equation, though nonlinear, the kinetic energy density appears only through its various spatial derivatives. With a physically consistent generalization of the normalization constraint, the solution of the differential equation as a functional of the density,gives a firstdegree homogeneous twoparticle noninteracting kineticenergy density functional, which can be considered as the second element of a series of firstdegree homogeneous density functionals that give the exact noninteracting kinetic energy for densities of a given particle number, the first of which is the Weizsacker functional. (C) 2002 Elsevier Science B.V. All rights reserved.  

Language 



English


Source (journal) 



Physics letters: A.  Amsterdam, 1967, currens 

Publication 



Amsterdam : 2002


ISSN 



03759601


Volume/pages 



302:23(2002), p. 5558


ISI 



000178359500001


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