Title 



Comment on "Kinetic energy as a density functional"
 
Author 



 
Abstract 



In a recent paper, Nesbet [Phys. Rev. A 65, 010502(R) (2001)] has proposed dropping "the widespread but unjustified assumption that the existence of a groundstate density functional for the kinetic energy, Ts[rho], of an Nelectron system implies the existence of a densityfunctional derivative, deltaT(s)[rho]/deltarho(r), equivalent to a local potential function," because, according to his arguments, this derivative "has the mathematical character of a linear operator that acts on orbital wave functions." Our Comment demonstrates that the statement called by Nesbet an "unjustified assumption" happens, in fact, to be a rigorously proven theorem. Therefore, his previous conclusions stemming from his different view of this derivative, which undermined the foundations of densityfunctional theory, can be discounted.   
Language 



English
 
Source (journal) 



Physical review : A : atomic, molecular and optical physics.  Lancaster, Pa, 1990  2015  
Publication 



Lancaster, Pa : 2002
 
ISSN 



10941622 [online]
10502947 [print]
 
Volume/pages 



66:6(2002), 3 p.
 
Article Reference 



066501
 
ISI 



000180656800126
 
Medium 



Eonly publicatie
 
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