Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Nuclear Structure - "ab initio"   An ab-initio description of atomic nuclei that solves the nuclear many-body
problem for realistic nuclear forces is expected to possess a high degree of
predictive power. In this contribution we treat the main obstacle, namely the
short-ranged repulsive and tensor correlations induced by the realistic
nucleon-nucleon interaction, by means of a unitary correlation operator. This
correlator applied to uncorrelated many-body states imprints short-ranged
correlations that cannot be described by product states. When applied to an
observable it induces the correlations into the operator, creating for example
a correlated Hamiltonian suited for Slater determinants. Adding to the
correlated realistic interaction a correction for three-body effects,
consisting of a momentum-dependent central and spin-orbit two-body potential we
obtain an effective interaction that is successfully used for all nuclei up to
mass 60. Various results are shown.

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The categories of this paper are: q-alg
23
The categories of this paper are: solv-int
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The categories of this paper are: atom-ph
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The categories of this paper are: supr-con
10
The categories of this paper are: q-bio
28
The categories of this paper are: alg-geom
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The categories of this paper are: dg-ga
4
The categories of this paper are: cond-mat
31
The categories of this paper are: ao-sci
11
The categories of this paper are: hep-lat
22
The categories of this paper are: chao-dyn
13
The categories of this paper are: quant-ph
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The categories of this paper are: patt-sol
21
The categories of this paper are: adap-org
0
The categories of this paper are: hep-ph
17
The categories of this paper are: q-fin