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- W2285040345 abstract "Regulator functions applied to two- and three-nucleon forces are a necessary ingredient in many-body calculations based on chiral effective field theory interactions. These interactions have been developed recently with a variety of different cutoff forms, including regulating both the momentum transfer (local) and the relative momentum (nonlocal). While in principle any regulator that suppresses high-momentum modes can be employed, in practice artifacts are inevitable in current power counting schemes. Artifacts from particular regulators may cause significant distortions of the physics or may affect many-body convergence rates, so understanding their nature is important. Here we characterize the differences between cutoff effects using uniform matter at Hartree--Fock and second order in the interaction as a test-bed. This provides a clean laboratory to isolate phase-space effects of various regulators on both two- and three-nucleon interactions. We test the normal-ordering approximation for three-nucleon forces in nuclear matter and find that the relative size of the residual $3N$ contributions is sensitive to the employed regularization scheme." @default.
- W2285040345 created "2016-06-24" @default.
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- W2285040345 date "2016-09-02" @default.
- W2285040345 modified "2023-10-18" @default.
- W2285040345 title "Regulator artifacts in uniform matter for chiral interactions" @default.
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- W2285040345 doi "https://doi.org/10.1103/physrevc.94.034001" @default.
- W2285040345 hasPublicationYear "2016" @default.
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