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

Autor:	Wetterich, C.
Rok vydání:	2024
Předmět:	High Energy Physics - Theory Condensed Matter - Strongly Correlated Electrons General Relativity and Quantum Cosmology
Druh dokumentu:	Working Paper
Popis:	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. Comment: Extended discussion of macroscopic correlation functions, 36 pages
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/2402.04679 Zobrazit plný text záznamu View this record from Arxiv