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arXiv 1603.06993math-phgr-qcmath.MP
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有效量子引力观测量和局部协变QFT

Effective quantum gravity observables and locally covariant QFT

Kasia Rejzner

摘要:

微扰代数量子场论(pAQFT)是一个数学上严格的框架,它允许在一般的洛伦兹流形上构造量子场论的模型。最近,这一思想也被应用于微扰量子引力,被视为一种有效的理论。困难的是找到正确的概念,观察,将在适当的意义上是同胚不变。在这篇文章中,我将概述一个一般的框架,允许用BV(Batalin-Vilkovisky)形式主义来描述具有局部对称性的理论(这包括无穷小的同态变换)。在最近的一篇论文中,这种方法已经成功地应用于有效量子引力。Brunetti,K.弗雷德里克和我自己。在同一篇论文中,我们还证明了量子化理论的微扰背景无关性,这也将在本工作中讨论。

英文摘要:

Perturbative algebraic quantum field theory (pAQFT) is a mathematically rigorous framework that allows to construct models of quantum field theories on a general class of Lorentzian manifolds. Recently this idea has been applied also to perturbative quantum gravity, treated as an effective theory. The difficulty was to find the right notion of observables that would in an appropriate sense be diffeomorphism invariant. In this article I will outline a general framework that allows to quantize theories with local symmetries (this includes infinitesimal diffeomorphism transformations) with the use of the BV (Batalin-Vilkovisky) formalism. This approach has been successfully applied to effective quantum gravity in a recent paper by R. Brunetti, K. Fredenhagen and myself. In the same paper we also proved perturbative background independence of the quantized theory, which is going to be discussed in the present work as well.

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