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Effective Field Theories [PDF]
Particles, 2020 This paper represents a pedagogical introduction to low-energy effective field theories. In some of them, heavy particles are “integrated out” (a typical example—the Heisenberg–Euler EFT); in some, heavy particles remain but some of their degrees of ...
Andrey Grozin
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Proceedings of 3rd Quantum Gravity and Quantum Geometry School — PoS(QGQGS 2011), 2013 Group field theories are particular quantum field theories defined on D copies of a group which reproduce spin foam amplitudes on a space-time of dimension D. In these lecture notes, we present the general construction of group field theories, merging ideas from tensor models and loop quantum gravity. This lecture is organized as follows.
Krajewski, Thomas
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Journal of High Energy Physics, 2019 We study renormalization group (RG) fixed points of scalar field theories endowed with the discrete symmetry groups of regular polytopes. We employ the functional perturbative renormalization group (FPRG) approach and the ϵ-expansion in d = d c − ϵ.
Riccardo Ben Alì Zinati +2 more
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NONCOMMUTATIVE FIELD THEORIES AND (SUPER)STRING FIELD THEORIES [PDF]
Particles and Fields, 2002 In this lecture notes we explain and discuss some ideas concerning noncommutative geometry in general, as well as noncommutative field theories and string field theories. We consider noncommutative quantum field theories emphasizing an issue of their renormalizability and the UV/IR mixing. Sen's conjectures on open string tachyon condensation and their
Aref'eva, I. Ya. +4 more
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Forum for Group Psychotherapies and ProcessesThe study presented in this section aims at exploring a reflection focused on the conditions of the origins and development of the Identity, in its many two-dimensional characterizations: personal/social, corporeal/mental, active/ representative ...
Daniele Reggianini
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Productive Imagination in Painting from Ricoeur's Point of View [PDF]
Journal of Philosophical Investigations, 2023 The study of imagination has always had a significant role in the study of art and aesthetics. And imagination plays a central role in Ricoeur's philosophical system; a subject that has received less attention.
Mohammad Sadegh Gheysari, Amir Maziar
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The Scalar, Vector and Tensor Fields in Theory of Elasticity and Plasticity [PDF]
Transactions of the VŠB-Technical University of Ostrava, Mechanical Series, 2014 This article is devoted to an analysis of scalar, vector and tensor fields, which occur in the loaded and deformed bodies. The aim of this article is to clarify and simplify the creation of an understandable idea of some elementary concepts and ...
František FOJTÍK, Radim HALAMA
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AdS field theory from conformal field theory [PDF]
Journal of High Energy Physics, 2013 Abstract We provide necessary and sufficient conditions for a Conformal Field Theory to have a description in terms of a perturbative Effective Field Theory in AdS. The first two conditions are well-known: the existence of a perturbative ‘1/N ’ expansion and an approximate Fock space of states generated by a finite number of low ...
Fitzpatrick, A. Liam, Kaplan, Jared
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Extremal effective field theories
Journal of High Energy Physics, 2021 Effective field theories (EFT) parameterize the long-distance effects of short-distance dynamics whose details may or may not be known. Previous work showed that EFT coefficients must obey certain positivity constraints if causality and unitarity are ...
Simon Caron-Huot, Vincent Van Duong
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Regularization in quantum field theories
Vojnotehnički Glasnik, 2022 Introduction/purpose: The principal techniques of regularization schemes and their validity for gauge field theories are discussed. Methods: Schemes of dimensional regularization, Pauli–Villars and lattice regularization are discussed.
Nicola Fabiano
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