Interpretation of multiple solutions in fully iterative GF2 and GW schemes using local analysis of two-particle density matrices
Pavel Pokhilko,
Dominika Zgid
Abstract:Due to non-linear structure, iterative Green's function methods can result in multiple different solutions even for simple molecular systems. In contrast to the wavefunction methods, a detailed and careful analysis of such molecular solutions was not performed before. In this work, we use two-particle density matrices to investigate local spin and charge correlators that quantify the charge-resonance and covalent characters of these solutions. When applied within unrestricted orbital set, spin correlators eluc… Show more
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