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Three-body interactions in Fermi systems

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arxiv 1101.4858 v1 pith:STUHON3C submitted 2011-01-25 nucl-th cond-mat.quant-gashep-phnucl-ex

B. Friman , A. Schwenk This is my paper · ORCID
classification nucl-thcond-mat.quant-gashep-phnucl-ex
keywords fermiinteractionssystemscontributionsdensitysuppressedthree-quasiparticleadded
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We show that the contributions of three-quasiparticle interactions to normal Fermi systems at low energies and temperatures are suppressed by n_q/n compared to two-body interactions, where n_q is the density of excited or added quasiparticles and n is the ground-state density. For finite Fermi systems, three-quasiparticle contributions are suppressed by the corresponding ratio of particle numbers N_q/N. This is illustrated for polarons in strongly interacting spin-polarized Fermi gases and for valence neutrons in neutron-rich calcium isotopes.

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  1. Improved structure of calcium isotopes from ab initio calculations

    nucl-th 2024-11 conditional novelty 6.0 of 10

    IMSRG(3)-N7 calculations for calcium-44, -48, and -52 show that three-body flow corrections substantially lower the 48Ca 2+ energy, improving the description of the N=28 shell closure, while leaving the 52Ca charge-ra...

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