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Finite amplitude method for the RPA solution

Takashi Nakatsukasa·Tsunenori Inakura·Kazuhiro Yabana
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Abstract

We propose a practical method to solve the random-phase approximation (RPA) in the self-consistent Hartree-Fock (HF) and density-functional theory. The method is based on numerical evaluation of the residual interactions utilizing finite amplitude of single-particle wave functions. The method only requires calculations of the single-particle Hamiltonian constructed with independent bra and ket states. Using the present method, the RPA calculation becomes possible with a little extension of a numerical code of the static HF calculation. We demonstrate usefulness and accuracy of the present method performing test calculations for isoscalar responses in deformed 20Ne.

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Takashi Nakatsukasa, Tsunenori Inakura, Kazuhiro Yabana. 2007-03-30. Finite amplitude method for the RPA solution. https://doi.org/10.1103/physrevc.76.024318

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