翻訳と辞書 Words near each other ・ Corridor ・ Correlates of immunity/correlates of protection ・ Correlates of War ・ Correlation (disambiguation) ・ Correlation (projective geometry) ・ Correlation and dependence ・ Correlation attack ・ Correlation clustering ・ Correlation coefficient ・ Correlation database ・ Correlation dimension ・ Correlation does not imply causation ・ Correlation function ・ Correlation function (astronomy) ・ Correlation function (disambiguation) ・ Correlation function (quantum field theory) ・ Correlation function (statistical mechanics) ・ Correlation immunity ・ Correlation inequality ・ Correlation integral ・ Correlation ratio ・ Correlation sum ・ Correlation swap ・ Correlation trading ・ Correlation Ventures ・ Correlations (album) ・ Correlative ・ Correlative rights doctrine ・ Correlative verse ・ Correlative-based fallacies Dictionary Lists mini英和辞書 mini和英辞書 Webster 1913 Latin-English FOLDOC Wikipedia English ウィキペディア

翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Correlation function (quantum field theory) ： ウィキペディア英語版 Correlation function (quantum field theory) In quantum field theory, the (real space) ''n''-point correlation function is defined as the functional average (functional expectation value) of a product of $n$ field operators at different positions :$C\_n(x\_1,\; x\_2,\backslash ldots,x\_n)\; :=\; \backslash left\backslash langle\; \backslash phi(x\_1)\; \backslash phi(x\_2)\; \backslash ldots\; \backslash phi(x\_n)\backslash right\backslash rangle$ =\frac{\int D \phi \; e^{-S()}} For time-dependent correlation functions, the time-ordering operator $T$ is included. Correlation functions are also called simply correlators. Sometimes, the phrase Green's function is used not only for two-point functions, but for any correlators. * The correlation function can be interpreted physically as the amplitude for propagation of a particle or excitation between y and x. In the free theory, it is simply the Feynman propagator(for n=2). (more information see 'An Introduction to Quantum Field Theory' by Peskin & Schroeder, Section 4.2 : Perturbation Expansion of Correlation Functions ) ==See also== * Connected correlation function * One particle irreducible correlation function * Green's function (many-body theory) * Partition function (mathematics) 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「Correlation function (quantum field theory)」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.