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arXiv 1302.3038gr-qchep-th
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量子时空上的QFT:一个相容的经典框架

QFT on quantum spacetime: a compatible classical framework

Andrea Dapor, Jerzy Lewandowski, Jacek Puchta

摘要:

我们发展了一个系统的经典框架,以适应正则量子化的几何和物质微扰的量子均匀各向同性平坦时空。现有的标准宇宙学扰动的方法确实被证明是好的,只有到一阶的不均匀性,只有当背景是经典处理。为了一致地将扰动\emph{and}消除在背景中,需要一组新的经典相空间变量。我们表明,在一个自然的规范,一组这样的狄拉克可观的存在,和他们的代数是标准形式。最后,我们计算的物理哈密顿量,产生的动力学的K-G“时钟”字段$T$的均匀部分,这样的可观的。这项工作的结果提供了一个很好的起点,理解和计算量子宇宙时空的背景上的量子微扰的度量张量和物质场的影响。

英文摘要:

We develop a systematic classical framework to accommodate canonical quantization of geometric and matter perturbations on a quantum homogeneous isotropic flat spacetime. The existing approach of standard cosmological perturbations is indeed proved to be good only up to first order in the inhomogeneities, and only if the background is treated classically. To consistently quantize the perturbations \emph{and} the background, a new set of classical phase space variables is required. We show that, in a natural gauge, a set of such Dirac observables exists, and their algebra is of the canonical form. Finally, we compute the physical Hamiltonian that generates the dynamics of such observables with respect to the homogeneous part of a K-G "clock" field $T$. The results of this work provide a good starting point to understanding and calculating effects that quantum cosmological spacetime in the background has on the quantum perturbations of the metric tensor and of matter fields.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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