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    Current-Dependent Exchange-Correlation Potential for Dynamical Linear Response Theory

    Vignale, Giovanni, 1957-
    Kohn, Walter
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    [PDF] CurrentDependentExchangeCorrelation.pdf (151.8Kb)
    Date
    1996
    Format
    Article
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    Abstract
    The frequency-dependent exchange-correlation potential, which appears in the usual Kohn- Sham formulation of a time-dependent linear response problem, is a strongly nonlocal functional of the density, so that a consistent local density approximation generally does not exist. This problem can be avoided by choosing the current density as the basic variable in a generalized Kohn-Sham theory. This theory admits a local approximation which, for fixed frequency, is exact in the limit of slowly varying densities and perturbing potentials.
    URI
    http://hdl.handle.net/10355/7947
    Citation
    Phys. Rev. Lett. 77, 2037-2040 (1996)
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