Tunneling Processes of a Heavy Particle Coupled to Metallic Electron Systems
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概要
- 論文の詳細を見る
A new formalism to treat the tunneling processes of a heavy particle coupled to degenerate electron systems has been presented. This simple and transparent method follows that of Caldeira and Leggett in a general framework, but the term representing the dissipation is given in terms of the imaginary part of the retarded density correlation function as far as the coupling is weak. Hence our method can incorporate the microscopic details of the electronic systems such as mutual interactions and randomness. It is found that for the Luttinger liquid, the dissipation can be either sub- or super-Ohmic depending on the type of interaction, while near the Anderson transition there exists a crossover from Ohmic to sub-Ohmic dissipation. In the case of sub-Ohmic dissipation, the tunneling rate is found to vanish discontinuously above some critical value as a function of the strength of dissipation.
- 社団法人日本物理学会の論文
- 1993-06-15
著者
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FUKUYAMA Hidetoshi
Department of Applied Physics, Tokyo University of Science
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Fukuyama Hidetoshi
Department Of Physics Univercsity Of Tokyo
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TATARA Gen
Department of Physics, Tokyo Metropolitan University
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Tatara G
Osaka Univ. Osaka
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Tatara Gen
Department Of Earth And Space Science Osaka University
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Awaka K
Univ. Tokyo Tokyo
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Awaka Kaoru
Department Of Physics University Of Tokyo
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Fukuyama Hidetoshi
Department Of Applied Physics Faculty Of Science Tokyo University Of Science
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TATARA Gen
Institute of Physics, College of Arts and Sciences University of Tokyo
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Fukuyama Hidetoshi
Department of Applied Physics and Research Institute for Science and Technology, Tokyo University of Science, Shinjuku, Tokyo 162-8601, Japan
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