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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 RST model ： ウィキペディア英語版 RST model The Russo–Susskind–Thorlacius model〔 〕 or RST model in short is a modification of the CGHS model to take care of conformal anomalies. In the CGHS model, if we include Faddeev-Popov ghosts to gauge-fix diffeomorphisms in the conformal gauge, they contribute an anomaly of -24. Each matter field contributes an anomaly of 1. So, unless N=24, we will have gravitational anomalies. To the CGHS action :$S\_\; \backslash int\; d^2x\backslash ,\; \backslash sqrt\backslash left\backslash \; \backslash frac\backslash left(\; \backslash nabla\; f\_i\; \backslash right)^2\; \backslash right\backslash \}$, the following term :$S\_\; \backslash int\; d^2x\backslash ,\; \backslash sqrt\; \backslash left(R\backslash fracR\; -\; 2\backslash phi\; R\; \backslash right)$ is added, where ''κ'' is either $(N-24)/12$ or $N/12$ depending upon whether ghosts are considered. The nonlocal term leads to nonlocality. In the conformal gauge, :$S\_\; \backslash int\; dx^+\backslash ,dx^-\; \backslash left(\backslash partial\_+\; \backslash rho\; \backslash partial\_-\; \backslash rho\; +\; \backslash phi\; \backslash partial\_+\; \backslash partial\_-\; \backslash rho\; \backslash right)$. It might appear as if the theory is local in the conformal gauge, but this overlooks the fact that the Raychaudhuri equations are still nonlocal. == References == 〔 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「RST model」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.