Center of mass and relative motion in time dependent density functional theory
G Vignale - Physical review letters, 1995 - APS
Physical review letters, 1995•APS
It is shown that the theorem asserting separability of the center of mass motion for a system
of interacting particles in a harmonic external potential is satisfied in the time dependent
density functional theory, provided that the exchange-correlation potential satisfies a simple
symmetry under transformation to an accelerated frame of reference. Examples of
approximations for the exchange-correlation potential which satisfy or violate this symmetry
are given.
of interacting particles in a harmonic external potential is satisfied in the time dependent
density functional theory, provided that the exchange-correlation potential satisfies a simple
symmetry under transformation to an accelerated frame of reference. Examples of
approximations for the exchange-correlation potential which satisfy or violate this symmetry
are given.
Abstract
It is shown that the theorem asserting separability of the center of mass motion for a system of interacting particles in a harmonic external potential is satisfied in the time dependent density functional theory, provided that the exchange-correlation potential satisfies a simple symmetry under transformation to an accelerated frame of reference. Examples of approximations for the exchange-correlation potential which satisfy or violate this symmetry are given.
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