An efficient method for the Quantum Monte Carlo evaluation of the static density-response function of a many-electron system

Details An efficient method for the Quantum Monte Carlo evaluation of the static density-response function of a many-electron system An efficient method for the Quantum Monte Carlo evaluation of the static density-response function of a many-electron system

2009-07-06

arxiv.org/abs/0907.0879v2

Physics

Condensed Matter

Other Condensed Matter

Scientific paper

In a recent Letter we introduced Hellmann-Feynman operator sampling in diffusion Monte Carlo calculations. Here we derive, by evaluating the second derivative of the total energy, an efficient method for the calculation of the static density-response function of a many-electron system. Our analysis of the effect of the nodes suggests that correlation is described correctly and we find that the effect of the nodes can be dealt with.

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