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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 Local quantum field theory ： ウィキペディア英語版 Local quantum field theory The Haag–Kastler axiomatic framework for quantum field theory, introduced by , is an application to ''local'' quantum physics of C *-algebra theory. Because of this it is also known as Algebraic Quantum Field Theory (AQFT). The axioms are stated in terms of an algebra given for every open set in Minkowski space, and mappings between those. Let Mink be the category of open subsets of Minkowski space M with inclusion maps as morphisms. We are given a covariant functor $\backslash mathcal$ from Mink to uC *alg, the category of unital C * algebras, such that every morphism in Mink maps to a monomorphism in uC *alg (''isotony''). The Poincaré group acts continuously on Mink. There exists a pullback of this action, which is continuous in the norm topology of $\backslash mathcal(M)$ (Poincaré covariance). Minkowski space has a causal structure. If an open set ''V'' lies in the causal complement of an open set ''U'', then the image of the maps :$\backslash mathcal(i\_)$ and :$\backslash mathcal(i\_)$ commute (spacelike commutativity). If $\backslash bar$ is the causal completion of an open set ''U'', then $\backslash mathcal(i\_(M)$, we can take the "partial trace" to get states associated with $\backslash mathcal(U)$ for each open set via the net monomorphism. The states over the open sets form a presheaf structure. According to the GNS construction, for each state, we can associate a Hilbert space representation of $\backslash mathcal(M).$ Pure states correspond to irreducible representations and mixed states correspond to reducible representations. Each irreducible (up to equivalence) is called a superselection sector. We assume there is a pure state called the vacuum such that the Hilbert space associated with it is a unitary representation of the Poincaré group compatible with the Poincaré covariance of the net such that if we look at the Poincaré algebra, the spectrum with respect to energy-momentum (corresponding to spacetime translations) lies on and in the positive light cone. This is the vacuum sector. More recently, the approach has been further implemented to include an algebraic version of quantum field theory in curved spacetime. Indeed, the viewpoint of local quantum physics is in particular suitable to generalize the renormalization procedure to the theory of quantum fields developed on curved backgrounds. Several rigorous results concerning QFT in presence of a black hole have been obtained. == List of researchers in local quantum field theory == * Detlev Buchholz * Rudolf Haag * Daniel Kastler * Karl-Henning Rehren * Bert Schroer 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「Local 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.