Unitary-Model-Operator Approach to Nuclear Effective Interaction. II: Effects of Three-Body Cluster Term | Zendy

K. Suzuki | Zendy

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Unitary-Model-Operator Approach to Nuclear Effective Interaction. II: Effects of Three-Body Cluster Term

Author(s) -

K. Suzuki

Publication year - 1982

Publication title -

progress of theoretical physics

Language(s) - English

Resource type - Journals

eISSN - 1347-4081

pISSN - 0033-068X

DOI - 10.1143/ptp.68.1999

Subject(s) - physics , unitary state , hamiltonian (control theory) , term (time) , coupled cluster , cluster (spacecraft) , unitary operator , cluster expansion , operator (biology) , valence (chemistry) , unitary transformation , theoretical physics , quantum mechanics , mathematics , biochemistry , chemistry , repressor , hilbert space , political science , computer science , transcription factor , law , quantum , gene , programming language , mathematical optimization , molecule

The problem of the short-range correlations in nuclei is studied in the framework of the unitary-model-operator approach. A unitary-transformed Hamiltonian is introduced and given in a cluster expansion form. A general theory of treating the effects of the three-body cluster teim is proposed. It is emphasized that the one-body average field representing the dispersive effect of medium plays an important role in the evaluation of the contributions of the three-body cluster term to the oneand two-body effective interactions acting among valence particles. It is shown that the core-polarization term with rather high 3P-1h intermediate states is derived naturally from the analysis of the three-body cluster term and it appears as the leading correction term to the oneand two-body effective interactions. The relation is discussed between the present approach and the usual linked-diagram theory based on the G matrix.

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