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    Solving the Ultranonlocality Problem in Time-Dependent Spin-Density-Functional Theory

    Qian, Zhixin
    Constantinescu, Adi
    Vignale, Giovanni, 1957-
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    [PDF] SolvingUltranonlocalityProblemTime.pdf (109.6Kb)
    Date
    2003
    Format
    Article
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    Abstract
    It has been known for some time that the exchange-correlation potential in time- dependent density-functional theory is an intrinsically nonlocal functional of the density as soon as one goes beyond the adiabatic approximation. In this paper we show that a much more severe nonlocality problem, with a completely different physical origin, plagues the exchange-correlation potentials in time-dependent spin-density functional theory. We show how the use of the spin current density as a basic variable solves this problem, and we provide an explicit local expression for the exchange-correlation fields as functionals of the spin currents.
    URI
    http://hdl.handle.net/10355/7798
    Citation
    Phys. Rev. Lett. 90, 066402 (2003)
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