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LIBRIS Formathandbok  (Information om MARC21)
FältnamnIndikatorerMetadata
00003224naa a2200373 4500
001oai:research.chalmers.se:75b3c91d-0f55-4c55-ba90-cd66f228d5a8
003SwePub
008210902s2021 | |||||||||||000 ||eng|
024a https://research.chalmers.se/publication/5257972 URI
024a https://doi.org/10.1103/PhysRevC.104.0243242 DOI
040 a (SwePub)cth
041 a engb eng
042 9 SwePub
072 7a art2 swepub-publicationtype
072 7a ref2 swepub-contenttype
100a Djärv, Tor,d 1991u Chalmers tekniska högskola,Chalmers University of Technology4 aut0 (Swepub:cth)djarv
2451 0a Normal-ordering approximations and translational (non)invariance
264 1c 2021
338 a electronic2 rdacarrier
520 a Normal ordering provides an approach to approximate three-body forces as effective two-body operators and it is therefore an important tool in many-body calculations with realistic nuclear interactions. The corresponding neglect of certain three-body terms in the normal-ordered Hamiltonian is known to influence translational invariance, although the magnitude of this effect has not yet been systematically quantified. In this paper we study in particular the normal-ordering two-body approximation applied to a single harmonic-oscillator reference state. We explicate the breaking of translational invariance and demonstrate the magnitude of the approximation error as a function of model space parameters for He-4 and O-16 by performing full no-core shell-model calculations with and without three-nucleon forces. We combine two different diagnostics to better monitor the breaking of translational invariance. While the center-of-mass effect is shown to become potentially very large for He-4, it is also shown to be much smaller for O-16 although full convergence is not reached. These tools can be easily implemented in studies using other many-body frameworks and bases.
650 7a NATURVETENSKAPx Data- och informationsvetenskapx Språkteknologi0 (SwePub)102082 hsv//swe
650 7a NATURAL SCIENCESx Computer and Information Sciencesx Language Technology0 (SwePub)102082 hsv//eng
650 7a NATURVETENSKAPx Matematikx Beräkningsmatematik0 (SwePub)101052 hsv//swe
650 7a NATURAL SCIENCESx Mathematicsx Computational Mathematics0 (SwePub)101052 hsv//eng
650 7a NATURVETENSKAPx Matematikx Matematisk analys0 (SwePub)101012 hsv//swe
650 7a NATURAL SCIENCESx Mathematicsx Mathematical Analysis0 (SwePub)101012 hsv//eng
700a Ekström, Andreas,d 1980u Chalmers tekniska högskola,Chalmers University of Technology4 aut0 (Swepub:cth)andeks
700a Forssén, Christian,d 1974u Chalmers tekniska högskola,Chalmers University of Technology4 aut0 (Swepub:cth)f2bcf
700a Jansen, G. R.u Oak Ridge National Laboratory4 aut
710a Chalmers tekniska högskolab Oak Ridge National Laboratory4 org
773t Physical Review Cg 104:2q 104:2x 2469-9985x 2469-9993
856u https://research.chalmers.se/publication/525797/file/525797_Fulltext.pdfx primaryx freey FULLTEXT
8564 8u https://research.chalmers.se/publication/525797
8564 8u https://doi.org/10.1103/PhysRevC.104.024324

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