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Beyond the Random Phase Approximation for the Electron Correlation Energy: The Importance of Single Excitations
the Electron Correlation Energy Single Excitations
2010/11/17
The random phase approximation (RPA) for the electron correlation energy, combined with the exact-exchange energy, represents the state-of-the-art exchange-correlation functional within density-funct...
The spin dynamics of molecular magnets beyond Kubo's linear response theory
nanomagnets spin dynamics Kubo response theory perturbation theory
2010/7/8
The description of quantum dynamics of nanomagnets is a central issue in most applications proposed for those systems. In this paper, we put forward a modified perturbation approach to study the spin ...