Center of Mass and Relative Motion in Time Dependent Density Functional Theory
- 17 April 1995
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 74 (16) , 3233-3236
- https://doi.org/10.1103/physrevlett.74.3233
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.Keywords
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