Comparison of Density-Matrix Theory and Pairing Theory(Nuclear Physics)
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概要
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The ground states and the first 2^+ states of ^<20>O and ^<22>O are derived using two schemes, one consisting of the Hartree-Fock-Bogoliubov theory (HFB) plus the quasi-particle random phase approximation (QRPA) and the other consisting of the stationary solution and the small amplitude limit of the time-dependent density-matrix theory (TDDM). It is found that although the two schemes give similar results for the ground state of ^<20>O, there are differences between the results obtained with the two methods for the first 2^+ state of ^<20>O and the ground state of ^<22>O : The first 2^+ state of ^<20>O derived with TDDM has a larger collectivity, and TDDM induces a long-range correlation in the ground state of ^<22>O, which cannot be obtained with the HFB calculation. The origins of the differences are discussed.
- 理論物理学刊行会の論文
- 2005-11-25
著者
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TOHYAMA Mitsuru
Kyorin University School of Medicine
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Tohyama Mitsuru
Kyorin Univ. School Of Medicine Mitaka Jpn
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