Projection Operators in the Theory of Two-Time Green Functions
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概要
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New projection operators are introduced in the theory of two-time Green functions. The self-energy part of the Green function is expressed in terms of the random force whose time development differes from usual one by a factor (1-P), P being the projection operator. In the case of the Bose system, we obtained the time-relaxation expression for the width function Γ(k,ω) of the dynamical structure factor, which satisfies the sum rule by Puff.
- 社団法人日本物理学会の論文
- 1972-03-05
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