The decay of excited He from Stochastic Density-Functional Theory: a quantum measurement theory interpretation

Details The decay of excited He from Stochastic Density-Functional Theory: a quantum measurement theory interpretation The decay of excited He from Stochastic Density-Functional Theory: a quantum measurement theory interpretation

2007-11-05

arxiv.org/abs/0711.0762v1

Physics

Condensed Matter

Other Condensed Matter

4 pages, 2 figures

Scientific paper

10.1088/0953-8984/20/39/395214

Recently, time-dependent current-density functional theory has been extended to include the dynamical interaction of quantum systems with external environments [Phys. Rev. Lett. {\bf 98}, 226403 (2007)]. Here we show that such a theory allows us to study a fundamentally important class of phenomena previously inaccessible by standard density-functional methods: the decay of excited systems. As an example we study the decay of an ensemble of excited He atoms, and discuss these results in the context of quantum measurement theory.

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