#
Deconstructing density functional theory

**Prof Kieron Burke**

University of California, Irvine, U,.S.A.

**
Jeudi 25 juin 2009, 11**^{h}00
In many fields of science, electronic structure calculations
use Kohn-Sham density functional
theory (DFT) which, to the outsider, employs some unearthly combination of
exact conditions, empiricism, and black magic to achieve useful accuracy.
In the last year, my group has found (we think) the true origin of DFT's
mysterious power, which springs from semiclassical approximations. By
imposing the correct boundary conditions, we find we can (i) produce much
more accurate approximations than the standard ones, (ii) derive
functionals semiclassically, removing all empiricism, and (iii) possibly
eliminate the need for DFT altogether. I will describe our latest results
in this area (see http://dft.uci.edu).