Canonical Correlation Formalism of an Anharmonic Brownian Oscillator Based on Projection Operator Technique
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概要
- 論文の詳細を見る
Two types of quantal Langevin equations are derived on the basis of thegeneralized Brownian motion theory, which is proposed by Mori, in canonicalcorrelation formalism with the aid of the quantum noise source approach. But,in order to treat strongly anharmonic crystals, simple projections which projectonto a linear set of variables are unsatisfactory. Thus, we derive kinetic equationsfor an anharmonic lattice vibrations by using a proper projection operator. Fromthe kinetic equation and the neutron scattering cross section calculated, an originof the central mode, which have been observed near the Curie point of displacive-type ferroelectrics, and the roles of anharmonicities are deduced in connectionwith the renormalized Hamiltonian which is transformed by the displacememxtOperator.
- 社団法人日本物理学会の論文
- 1978-05-15
著者
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Konno H
Institute Of Engineering Mechanics And Systems University Of Tsukuba:theoretical Division Los Alamos
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Konno Hidetoshi
Department Of Nuclear Engineering Faculty Of Engineering Hokkaido University
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