Journal Article

PUBDB-2025-04376

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Line defect correlators in fermionic CFTs

Barrat, J.DESY* ; Liendo, P.DESY* ; Vliet, P. J. v. (Corresponding author)Extern*

2025
Springer Heidelberg

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Please use a persistent id in citations: doi:10.1007/JHEP05(2025)146  doi:10.3204/PUBDB-2025-04376

Report No.: DESY-23-055; HU-EP-23/10-RTG; arXiv:2304.13588

Abstract: Scalar-fermion models, such as the Gross-Neveu-Yukawa model, admit natural 1d defects given by the exponential of a scalar field integrated along a straight line. In 4 − ε dimensions the defect coupling is weakly relevant and the setup defines a non-trivial interacting defect CFT. In this work we study correlation functions on these defect CFTs to order ε. We focus on 1d correlators constrained to the line, which include canonical operators like the displacement and the one-dimensional analog of the spin field. These results give access to perturbative CFT data that can be used as input in the numerical bootstrap. We also consider local operators outside the line, in particular two-point functions of scalars whose dynamics are non-trivial due to the presence of the defect.

Keyword(s): field theory: conformal ; operator: local ; two-point function: scalar ; dimension: 1 ; field theory: scalar ; defect ; correlation function ; bootstrap ; spin ; Renormalization Group ; Scale and Conformal Symmetries ; Field Theories in Higher Dimensions ; Field Theories in Lower Dimensions

Note: 44 pages, ancillary Mathematica notebook. V2 includes fixed typos, clarifications, additional references. Version accepted for publication in JHEP

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Contributing Institute(s):

1. Theorie-Gruppe (T)

Research Program(s):

1. 611 - Fundamental Particles and Forces (POF4-611) (POF4-611)
2. DFG project G:(GEPRIS)400570283 - Das Conformal Bootstrap Programm (400570283) (400570283)
3. GRK 2575 - GRK 2575: Überdenken der Quantenfeldtheorie (417533893) (417533893)
4. DFG project G:(GEPRIS)471314740 - Holographie und das Swampland: Konsistenzbedingungen an fundamentale Physik aus der Quantengravitation (471314740) (471314740)

Experiment(s):

1. No specific instrument

Appears in the scientific report 2025

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Database coverage:
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Linked articles:

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Preprint Barrat, J. ; Liendo, P.DESY* ; van Vliet, P. (Corresponding author)DESY*
Line defect correlators in fermionic CFTs
[10.3204/PUBDB-2023-01928]     Files  Fulltext by arXiv.org BibTeX | EndNote: XML, Text | RIS

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