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  Unitary Symmetry constraints on tensorial group field theory renormalization group flow

Lahoche, V., & Ousmane Samary, D. (2018). Unitary Symmetry constraints on tensorial group field theory renormalization group flow. Classical and quantum gravity, 35(19): 195006. doi:10.1088/1361-6382/aad83f.

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Item Permalink: http://hdl.handle.net/21.11116/0000-0001-40A9-8 Version Permalink: http://hdl.handle.net/21.11116/0000-0002-F65F-F
Genre: Journal Article

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 Creators:
Lahoche, Vincent, Author
Ousmane Samary, Dine1, Author              
Affiliations:
1Quantum Gravity & Unified Theories, AEI-Golm, MPI for Gravitational Physics, Max Planck Society, ou_24014              

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Free keywords: High Energy Physics - Theory, hep-th
 Abstract: Renormalization group methods are an essential ingredient in the study of nonperturbative problems of quantum field theory. This paper deal with the symmetry constraints on the renormalization group flow for quartic melonic tensorial group field theories. Using the unitary invariance of the interactions, we provide a set of Ward-Takahashi identities which leads to relations between correlation functions. There are numerous reasons to consider such Ward identities in the functional renormalization group. Their compatibility along the flow provides a non-trivial constraint on the reliability of the approximation schemes used in the non-perturbative regime, especially on the truncation and the choice of the regulator. We establish the so called structure equations in the melonic sector and in the symmetric phase. As an example we consider the $T^4_5$ TGFT model without gauge constraint. The Wetterich flow equation is given and the way to improve the truncation on the effective action is also scrutinized.

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 Dates: 2018-03-272018
 Publication Status: Published in print
 Pages: 41pages
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 Table of Contents: -
 Rev. Method: -
 Identifiers: arXiv: 1803.09902
URI: http://arxiv.org/abs/1803.09902
DOI: 10.1088/1361-6382/aad83f
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Title: Classical and quantum gravity
Source Genre: Journal
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Publ. Info: Bristol, U.K. : Institute of Physics
Pages: - Volume / Issue: 35 (19) Sequence Number: 195006 Start / End Page: - Identifier: ISSN: 0264-9381
CoNE: https://pure.mpg.de/cone/journals/resource/954925513480_1