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No.16 (1973/03) >

 
Title :The Field Theoretical Treatment of the Charged-Boson and –Fermion System : Ground State Energy and Elementary Excitations
Authors :Ginoza, Mitsuaki
Kanazawa, Hideo
Authors alternative :宜野座, 光昭
金沢, 秀夫
Issue Date :1-Mar-1973
Abstract :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.
Type Local :紀要論文
Publisher :琉球大学理工学部
URI :http://hdl.handle.net/20.500.12000/23491
Citation :琉球大学理工学部紀要. 理学編 = Bulletin of Science & Engineering Division, University of Ryukyus. Mathematics & natural sciences no.16 p.58 -72
Appears in Collections:No.16 (1973/03)

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