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arXiv 2402.04679hep-thcond-mat.str-elgr-qc
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泛函积分、有效作用量与泛函流方程中的场变换

Field transformations in functional integral, effective action and functional flow equations

C. Wetterich

AI总结:

本文系统评估了量子有效作用量与泛函流方程中场变换的不同版本,通过场依赖动能项的标量场论展示其揭示束缚态等物理特征及简化技术的能力,并证实了引力与宇宙学中的场相对性原理。

摘要:

量子有效作用量的场变换会为同一物理情境带来不同图像,正如用不同几何描述宇宙的同一演化过程。泛函流方程的场变换可以揭示重要的物理特征,例如束缚态的出现,同时也有助于技术上的简化。我们对不同版本的场变换的优点与不足进行了批判性评估。关键问题通过具有场依赖动能项系数的标量量子场论加以说明。我们的研究结果证实了基于量子有效作用量的引力与宇宙学中的场相对性原理。

英文摘要:

Field transformations for the quantum effective action lead to different pictures of a given physical situation, as describing a given evolution of the universe by different geometries. Field transformations for functional flow equations can reveal important physical features, as the appearance of bound states. They also allow for technical simplifications. We make a critical assessment of the virtues and shortcomings of different versions of field transformations. Key issues are demonstrated by the quantum field theory for scalars with a field-dependent coefficient of the kinetic term. Our findings confirm the principle of field relativity for gravity and cosmology based on the quantum effective action.

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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