Sökning: WFRF:(Forssén Christian) > Normal-ordering app...
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000 | 03224naa a2200373 4500 | |
001 | oai:research.chalmers.se:75b3c91d-0f55-4c55-ba90-cd66f228d5a8 | |
003 | SwePub | |
008 | 210902s2021 | |||||||||||000 ||eng| | |
024 | 7 | a https://research.chalmers.se/publication/5257972 URI |
024 | 7 | a https://doi.org/10.1103/PhysRevC.104.0243242 DOI |
040 | a (SwePub)cth | |
041 | a engb eng | |
042 | 9 SwePub | |
072 | 7 | a art2 swepub-publicationtype |
072 | 7 | a ref2 swepub-contenttype |
100 | 1 | a Djärv, Tor,d 1991u Chalmers tekniska högskola,Chalmers University of Technology4 aut0 (Swepub:cth)djarv |
245 | 1 0 | a Normal-ordering approximations and translational (non)invariance |
264 | 1 | c 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 | 7 | a NATURVETENSKAPx Data- och informationsvetenskapx Språkteknologi0 (SwePub)102082 hsv//swe |
650 | 7 | a NATURAL SCIENCESx Computer and Information Sciencesx Language Technology0 (SwePub)102082 hsv//eng |
650 | 7 | a NATURVETENSKAPx Matematikx Beräkningsmatematik0 (SwePub)101052 hsv//swe |
650 | 7 | a NATURAL SCIENCESx Mathematicsx Computational Mathematics0 (SwePub)101052 hsv//eng |
650 | 7 | a NATURVETENSKAPx Matematikx Matematisk analys0 (SwePub)101012 hsv//swe |
650 | 7 | a NATURAL SCIENCESx Mathematicsx Mathematical Analysis0 (SwePub)101012 hsv//eng |
700 | 1 | a Ekström, Andreas,d 1980u Chalmers tekniska högskola,Chalmers University of Technology4 aut0 (Swepub:cth)andeks |
700 | 1 | a Forssén, Christian,d 1974u Chalmers tekniska högskola,Chalmers University of Technology4 aut0 (Swepub:cth)f2bcf |
700 | 1 | a Jansen, G. R.u Oak Ridge National Laboratory4 aut |
710 | 2 | a Chalmers tekniska högskolab Oak Ridge National Laboratory4 org |
773 | 0 | t Physical Review Cg 104:2q 104:2x 2469-9985x 2469-9993 |
856 | 4 | u https://research.chalmers.se/publication/525797/file/525797_Fulltext.pdfx primaryx freey FULLTEXT |
856 | 4 8 | u https://research.chalmers.se/publication/525797 |
856 | 4 8 | u https://doi.org/10.1103/PhysRevC.104.024324 |
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