Fermionic Squeezed State for the O(4) Model as a Schematic Model in a Many-Fermion System(Nuclear Physics)
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概要
- 論文の詳細を見る
It is shown that a variational method with a squeezed state is a useful method for treating many-fermion systems, such as that of the pairing model, that goes beyond the usual Hartree-Fock-Bogoliubov approximation. A pairing-type quasi-spin squeezed state is constructed and adopted as a trial state in this variational method. By using this state, quantum fluctuations are taken into account. As a possible extension to the O(4) model, prospective squeezed states are investigated and its usefulness is discussed. From the viewpoint of the variational approach with a suitable trial state, a fermionic squeezed state is constructed and it is used to obtain a good result for the ground state energy in the O(4) model, while the direct product of two quasi-spin squeezed states based on the algebraic structure does not give a good approximation.
- 理論物理学刊行会の論文
- 2004-10-25
著者
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TSUE Yasuhiko
Physics Division, Faculty of Science, Kochi University
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NISHIYAMA Seiya
Physics Division, Faculty of Science, Kochi University
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Nishiyama Seiya
Physics Division Faculty Of Science Kochi University
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Tsue Yasuhiko
Physics Division Faculty Of Science Kochi University
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Nishiyama S
Physics Division Faculty Of Science Kochi University
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AKAIKE Hideaki
Department of Applied Science, Kochi University
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Akaike H
Kochi Univ. Kochi Jpn
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Akaike Hideaki
Department Of Applied Science Kochi University
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