{ "id": "0906.4276", "version": "v2", "published": "2009-06-23T14:42:49.000Z", "updated": "2009-08-05T08:47:23.000Z", "title": "Center-of-mass problem in truncated configuration interaction and coupled-cluster calculations", "authors": [ "Robert Roth", "Jeffrey R. Gour", "Piotr Piecuch" ], "comment": "6 pages, 1 figure, 2 tables; v2: minor modifications, Phys. Lett. B in print", "journal": "Phys.Lett.B679:334-339,2009", "doi": "10.1016/j.physletb.2009.07.071", "categories": [ "nucl-th" ], "abstract": "The problem of center-of-mass (CM) contaminations in ab initio nuclear structure calculations using configuration interaction (CI) and coupled-cluster (CC) approaches is analyzed. A rigorous and quantitative scheme for diagnosing the CM contamination of intrinsic observables is proposed and applied to ground-state calculations for He-4 and O-16. The CI and CC calculations for O-16 based on model spaces defined via a truncation of the single-particle basis lead to sizable CM contaminations, while the importance-truncated no-core shell model based on the $N_{\\max}\\hbar\\Omega$ space is virtually free of CM contaminations.", "revisions": [ { "version": "v2", "updated": "2009-08-05T08:47:23.000Z" } ], "analyses": { "subjects": [ "21.60.De", "21.60.Cs", "02.70.-c" ], "keywords": [ "truncated configuration interaction", "coupled-cluster calculations", "center-of-mass problem", "cm contamination", "ab initio nuclear structure calculations" ], "tags": [ "journal article" ], "publication": { "journal": "Physics Letters B", "year": 2009, "month": "Aug", "volume": 679, "number": 4, "pages": 334 }, "note": { "typesetting": "TeX", "pages": 6, "language": "en", "license": "arXiv", "status": "editable", "inspire": 823905, "adsabs": "2009PhLB..679..334R" } } }