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翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク source field ： ウィキペディア英語版 source field In theoretical physics, a source field is a field $J$ whose multiple :$S\_\; =\; J\backslash Phi$ appears in the action, multiplied by the original field $\backslash Phi$. Consequently, the source field appears on the right-hand side of the equations of motion (usually second-order partial differential equations) for $\backslash Phi$. When the field $\backslash Phi$ is the electromagnetic potential or the metric tensor, the source field is the electric current or the stress–energy tensor, respectively. All Green's functions (correlators) may be formally found via Taylor expansion of the partition sum considered as a function of the source fields. This method is commonly used in the path integral formulation of quantum field theory. The general method by which such source fields can be utilized to obtain propagators in both quantum, statistical-mechanics and other systems is outlined in the article on the partition function. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「source field」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.