Quantum Theory of Layer Vibration in the Layer-Structured Fermi Fluid : Nuclear Physics
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概要
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A method of introducing collective motion into the layered Fermi fluid (LFF) is discussed by concentrating on layer vibrations. By the random phase approximation (RPA), the original dynamical degrees of freedom of particles are separated into collective modes (CMs), uncorrelated (harmonic) oscillator modes (UOMs) and two-dimensional (2D) motions of particles within layers, which leads to a subband structure of particle spectrum. Transverse CMs cause the system's instability in case the interaction potential has too high a repulsive core. A primitive estimation of the correlation energy Δε due to CMs is presented in the Hartree-Fock approximation for a simple toy model with a square well potential. ∣Δε∣ is shown to be maximized when CMs are sustained by about one half of particles. There exists a density above which the Fermi surface intersects the lowest two bands and the interaction among CMs and particles will become attractive to provide a possible mechanism of superfluidity and/or superconductivity.
- 理論物理学刊行会の論文
- 1993-02-25
著者
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TAKAHASHI Koichi
Department of Biology, McGill University
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TAKAHASHI Keitaro
Department of Physics, School of Science, University of Tokyo
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TSUKAMOTO Tatsuo
Department of Nephrology & Dialysis, Kitano Hospital
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Tsukamoto Tatsuo
Department Of Immunopathology Gifu University Graduate School Of Medicine
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Takahashi Keitaro
Department Of Physics University Of Tokyo
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TSUKAMOTO Toshifumi
National Laboratory for High Energy Physics (KEK)
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Takahashi Koichi
Department Of Biology Faculty Of Science Shinshu University
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TAKAHASHI Koichi
Physics Department, Faculty of Science Tohoku University
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TAKAHASHI Koichi
College of Liberal Arts, Tohoku Gakuin University
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TSUKAMOTO Tatsuo
Department of Liberal Arts, Tohoku Gakuin University
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Tsukamoto Tatsuo
National Laboratory for High Energy Physics (KEK)
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