Density-matrix functional theory
- 27 August 2002
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review A
- Vol. 66 (2) , 022505
- https://doi.org/10.1103/physreva.66.022505
Abstract
An auxiliary system is defined by adiabatic connection. In the ground state the diagonal of the spin-independent second-order density matrix n can be determined by solving a single auxiliary equation of a two-particle problem. Thus the problem of an arbitrary system with even electrons can be reduced to a two-particle problem. The effective potential of the two-particle equation contains a term of completely kinetic origin.Keywords
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