Momentum Transfer between a Kink and a Phonon in the One-Dimensional φ^4System
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概要
- 論文の詳細を見る
Higher order collision process between a kink and a phonon is investigated inthe one-dimensional cfi' system. Diagrammatic perturbation method is used,where the amplitude of the phonon is the smallness parameter. It is shown that thephonon transfers the momentum to the kink in the fourth order. The momentumtransfer is obtained by the contributions of poles of order two in the integrals overmomenta. The final velocity of the kink, derived as a function of the incidentphonon wave number, reproduces exactly the result of the previous discussionusing conservation laws. The kink, which is not moving at first, begins to moveafter the collision in the direction of the incident phonon. The effective interactionbetween them is attractive. Possible mechanisms which determine the viscosityof the kink are pointed out.
- 社団法人日本物理学会の論文
- 1984-11-15
著者
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Wada Yasushi
Department Of Physics University Of Tokyo
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Ogata Masao
Department Of Basic Science Graduate School Of Arts And Science University Of Tokyo
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Wada Yasushi
Department of Materials Science,Faculty of Science,Hiroshima University
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Ogata Masao
Department of Physics,University of Tokyo
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