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- W3100150557 abstract "Over time, many different theories and approaches have been developed to tackle the many-body problem in quantum chemistry, condensed-matter physics, and nuclear physics. Here we use the helium atom, a real system rather than a model, and we use the exact solution of its Schrodinger equation as a benchmark for comparison between methods. We present new results beyond the random-phase approximation (RPA) from a renormalized RPA (r-RPA) in the framework of the self-consistent RPA (SCRPA) originally developed in nuclear physics, and compare them with various other approaches like configuration interaction (CI), quantum Monte Carlo (QMC), time-dependent density-functional theory (TDDFT), and the Bethe-Salpeter equation on top of the GW approximation. Most of the calculations are consistently done on the same footing, e.g. using the same basis set, in an effort for a most faithful comparison between methods." @default.
- W3100150557 created "2020-11-23" @default.
- W3100150557 creator A5000827095 @default.
- W3100150557 creator A5008614853 @default.
- W3100150557 creator A5016735960 @default.
- W3100150557 creator A5053871321 @default.
- W3100150557 date "2019-04-01" @default.
- W3100150557 modified "2023-10-12" @default.
- W3100150557 title "Comparing many-body approaches against the helium atom exact solution" @default.
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- W3100150557 doi "https://doi.org/10.21468/scipostphys.6.4.040" @default.
- W3100150557 hasPublicationYear "2019" @default.
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