Unique quantum stress fields

Christopher L. Rogers
2001 AIP Conference Proceedings  
We have recently developed a geometric formulation of the stress field for an interacting quantum system within the local density approximation (LDA) of density functional theory (DFT). We obtain a stress field which is invariant with respect to choice of energy density. In this paper, we explicitly demonstrate this uniqueness by deriving the stress field for different energy densities. We also explain why particular energy densities give expressions for the stress field that are more tractable
more » ... than others, thereby lending themselves more easily to first-principles calculations.
doi:10.1063/1.1399693 fatcat:hs2tht5zbfep3erqwup3sv3x44