2024-03-28T23:21:00Z
https://u-ryukyu.repo.nii.ac.jp/oai
oai:u-ryukyu.repo.nii.ac.jp:02006951
2022-10-31T03:12:11Z
1642837622505:1642837994858:1642837997689
1642838403551:1642838406414
The Field Theoretical Treatment of the Charged-Boson and –Fermion System : Ground State Energy and Elementary Excitations
Ginoza, Mitsuaki
Kanazawa, Hideo
宜野座, 光昭
金沢, 秀夫
The neutral system consisting of charged-bosons and -fermions has been investigated in terms of density parameter expansion at the high-density limit. The ground state energy of this system is calculated and accords with the result obtained in our previous work. The elementary excitations in the system determined from the poles of the boson Green's function are the two collective excitations in the low momentum region : acoustic- and optical-phonon like. The life-time of the acoustic phonon approaches infinite as s/v_f →0 where s and v_f arc the sound velocity and Fermi velocity, respectively, while that of the optical pbonon is infinite.
紀要論文
http://purl.org/coar/resource_type/c_6501
琉球大学理工学部
Science and Engineering Division, University of the Ryukyus
1973-03-01
NA
http://hdl.handle.net/20.500.12000/23491
AN0025080X
琉球大学理工学部紀要. 理学編
Bulletin of Science & Engineering Division, University of Ryukyus. Mathematics & natural sciences
16
72
58
eng
open access