Phonon-Like Excitations in Liquid Helium
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概要
- 論文の詳細を見る
An attempt is made to formulate a theory of phonon-like excitations in liquid helium by generalizing the theory of phonons in quantum crystals to quantum disordered systems. By using experimental data for pair correlation functions, dispersion curves of longitudinal phonon modes are calculated, with a result for their over-all behavior in fairly good agreement with phonon-roton dispersion curves obtained by neutron scattering measurements. It is shown that the temperature-dependence of the calculated roton-minimum is in good agreement with experiment for liquid helium I, but not for liquid helium II. A brief discussion is given on the nature of rotons in liquid helium. It is suggested that, within certain restrictions, the roton spectrum in liquid helium is likely to be a general feature of the dispersion of elementary excitations in liquids, classical or quantum.
- 理論物理学刊行会の論文
- 1972-09-25
著者
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Goda Masaki
Department Of Materials Science And Technology Faculty Of Engineering Institute Of Natural Science N
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Goda Masaki
Department Of Physics Hokkaido University : Research Institute For Fundamental Physics Kyoto Univers
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Takeno Shozo
Department Of Physics Faculty Of Engineering And Design Kyoto Institute Of Technology
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Takeno Shozo
Department Of Information Systems Faculty Of Information Science Osaka Institute Of Technology
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Takeno Shozo
Department Of Nuclear Engineering Kyoto University
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Takeno Shozo
Department Of General Education Osaka Institute Of Technology
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TAKENO Shozo
Department of Nuclear Engineering, Kyoto University
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GODA Masaki
Department of Physics, Hokkaido University : Research Institute for Fundamental Physics, Kyoto University
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