1.

図書

図書
宜野座光昭研究代表
出版情報: [西原町(沖縄県)] : [宜野座光昭], 2000.3
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2.

図書

図書
John Hendry[著] ; 宜野座光昭, 中里弘道共訳
出版情報: 東京 : 丸善, 1992.3
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3.

論文(リポジトリ)

論文(リポジトリ)
宜野座, 光昭 ; Ginoza, Mitsuaki
出版情報: 琉球大学理工学部紀要. 理学編 = Bulletin of Science & Engineering Division, University of Ryukyus. Mathematics & natural sciences.  pp.1-15,  1978-03.  琉球大学理工学部 — Science and Engineering Division, University of the Ryukyus
URL: http://hdl.handle.net/20.500.12000/24078
概要: The charge-density response function of a uniform two-component plasma is studied on the basis of the third frequency moment sum rule of its spectral function and the method of an equation of motion. An exact expression of the third sum rule is presented with emphasis on the existence of a singular term. It is found that available local-field theories for the response function do not satisfy this sum rule and any theory with frequency-independent local-field correction can not satisfy the third-and the perfect screening-sum rules, simultaneously. The response functionD^r_<ij>(q,w) and the corresponding frequency-dependent local-field correction G_<ij>(q,w) are calculated on the basis of the equation of motion. The obtained result yields a well-known relation between the pair correlation function and its radial derivative at r=0 for large wave vectors and satisfies the third-and the perfect screening-sum rules. 続きを見る
4.

論文(リポジトリ)

論文(リポジトリ)
Yonashiro, Katsukuni ; Kamizato, Tsuneo ; Ginoza, Mitsuaki ; 与那城, 勝邦 ; 神里, 常雄 ; 宜野座, 光昭
出版情報: 琉球大学理工学部紀要. 理学編 = Bulletin of Science & Engineering Division, University of Ryukyus. Mathematics & natural sciences.  pp.53-58,  1975-03-01.  琉球大学理工学部 — Science and Engineering Division, University of the Ryukyus
URL: http://hdl.handle.net/20.500.12000/23516
概要: The extended Hamiltonian and the canonical transformation used in the Nozieres-Pines collective approach to the dielectric constant are discussed on the basis of the general theorem conjectured by Bohm, Huang, and Pines. And the corrected generating function in the transformation is given. 続きを見る
5.

論文(リポジトリ)

論文(リポジトリ)
Ginoza, Mitsuaki ; 宜野座, 光昭
出版情報: 琉球大学理工学部紀要. 理学編 = Bulletin of Science & Engineering Division, University of Ryukyus. Mathematics & natural sciences.  pp.21-31,  1974-03.  琉球大学理工学部 — Science and Engineering Division, University of the Ryukyus
URL: http://hdl.handle.net/20.500.12000/24625
概要: In terms of a generalized dielectric constant ε (q,ω) defined by Nozieres and Pines, a multi-component, many-particle system with Coulomb interaction is described. By this formulation, various kinds of charged particle systems can be discussed from the unified point of view. ε (q,ω) is calculated in the random phase approximation (R.P.A.). Fermi(F), Bose(B), Bose and Bose(BB), Bose and Fermi(BF), and Fermi and Fermi(FF) systems are discussed. For F, B, BB, and BF, the ε (q,ω) obtained above leads directly to the results of Gell-Mann and Brueckner, Foldy, Bassichis, and Ginoza and Kanazawa, respectively. It is made obvious in this discussion that in the high density limit, the results obtained by treating Bose components by Bogoliubov method are naturally equivalent to those obtained in terms of the R.P.A. 続きを見る
6.

論文(リポジトリ)

論文(リポジトリ)
Ginoza, Mitsuaki ; Kanazawa, Hideo ; 宜野座, 光昭 ; 金沢, 秀夫
出版情報: 琉球大学理工学部紀要. 理学編 = Bulletin of Science & Engineering Division, University of Ryukyus. Mathematics & natural sciences.  pp.42-57,  1973-03-01.  琉球大学理工学部 — Science and Engineering Division, University of the Ryukyus
URL: http://hdl.handle.net/20.500.12000/23490
概要: In the neutural system consisting of the charged-bosons and –nonrelativistic fermions, the contribution △ E of the interaction between components to the ground state energy at the high-density limit is calculated in the density parameter expansion by the method of canonical transformation. The bosons which are dressed in the interaction cloud specified by a canonical transformation parameter are introduced. They have acoustic phonon-like dispersion relation for our choice of the parameter. The energy △ E in the unit of n_2m_2e_2^4/2 is calculated exactly to the second term when the sound velocity is smaller than the Fermi velocity and is given by (△E)/((n_2m_2e_2^4/2))=-(4Q)/(3^<1/4>π^2α) (m_1|e_1|^<5/3>)/(m_2|e_2|^<5/3>r_2^<1/4>)+((m_1e_1logr_2)/(2πm_2e_2))^2+O(logr_2), where n_2 is the number density of the bosons with mass m_2 and charge e_2, r_2= (3/4πn_2 )^<1/3> m_2e_2^2, Q=2.6220・・・ ・・・, a=(4/9π)^< 1/3>, and m_1 and e_1 are mass and charge of fermion, respectively. 続きを見る
7.

論文(リポジトリ)

論文(リポジトリ)
Ginoza, Mitsuaki ; Kanazawa, Hideo ; 宜野座, 光昭 ; 金沢, 秀夫
出版情報: 琉球大学理工学部紀要. 理学編 = Bulletin of Science & Engineering Division, University of Ryukyus. Mathematics & natural sciences.  pp.58-72,  1973-03-01.  琉球大学理工学部 — Science and Engineering Division, University of the Ryukyus
URL: http://hdl.handle.net/20.500.12000/23491
概要: 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. 続きを見る
8.

論文(リポジトリ)

論文(リポジトリ)
Ginoza, Mitsuaki ; Yonashiro, Katsukuni ; 宜野座, 光昭 ; 与那城, 勝邦
出版情報: 琉球大学理工学部紀要. 理学編 = Bulletin of Science & Engineering Division, University of Ryukyus. Mathematics & natural sciences.  pp.73-83,  1973-03-01.  琉球大学理工学部 — Science and Engineering Division, University of the Ryukyus
URL: http://hdl.handle.net/20.500.12000/23492
概要: The contribution of Coulomb interaction between boson and fermion to the low-temperature specific heat of this system wh ich is closely related to the Individual excitation in the system is calculated exactly in the density parameter expansion at the high-density limit. The specific heat of the system at the constant volume in the unit of the Sommerfeld value is given by C_V/C_S=[1+(G-M)+F(γ,△)+o(γ^2)]-^1 where (G-M) is the Gell-Mann’s term, the function F(γ,△) is the contribution of the interaction between components and has the limiting behavior as follows: F(γ,△)→-^γ_<18>-[logγ△+(π(△-1))/2,(γ/△)^<1/2>+O(γ)]as γapproches zero for fixed △, where the density parameter γ=4m_1 e^2_1/3^<1/3>π^<5/3>_<n1>^<1/3>, the parameter △ is independent of the density, and m_1 and e_1 are mass and charge of fermion, respectively. At this limit. F (γ,△) is the same order as (G-M) in the density parameter. The sharpness of the Fermi surface is also justified at this limit. 続きを見る