Chiral algebra, localization, modularity, surface defects, and all that
Abstract
We study the 2D vertex operator algebra (VOA) construction in 4D N = 2 superconformal field theories on S3 × S1, focusing on both old puzzles and new observations. The VOA lives on a two-torus , it is -graded, and this torus is equipped with the natural choice of spin structure (1,0) for the -graded operators, corresponding to the NS sector vacuum character. By analyzing the possible refinements of the Schur index that preserves the VOA, we find that it admits discrete deformations, which allows access to the remaining spin structures (1,1), (0,1), and (0,0), of which the latter two involve the inclusion of a particular surface defect. For Lagrangian theories, we perform the detailed analysis: we describe the natural supersymmetric background, perform localization, and derive the gauged symplectic boson action on a torus in any spin structure. In the absence of flavor fugacities, the 2D and 4D path integrals precisely match, including the Casimir factors. We further analyze the 2D theory: we identify its integration cycle and the two-point functions and interpret flavor holonomies as screening charges in the VOA. Next, we make some observations about modularity; the T-transformation acts on our four partition functions and lifts to a large diffeomorphism on S3 × S1. More interestingly, we generalize the four partition functions on the torus to an infinite family labeled by both the spin structure and the integration cycle inside the complexified maximal torus of the gauge group. Members of this family transform into one another under the full modular group, and we confirm the recent observation that the S-transform of the Schur index in Lagrangian theories exhibits logarithmic behavior. Finally, we comment on how locally our background reproduces the Ω-background.
- Authors:
-
- California Institute of Technology (CalTech), Pasadena, CA (United States)
- California Institute of Technology (CalTech), Pasadena, CA (United States); Univ. of Tokyo (Japan). Kavli Institute for the Physics and Mathematics of the Universe (WPI)
- Publication Date:
- Research Org.:
- California Institute of Technology (CalTech), Pasadena, CA (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC)
- OSTI Identifier:
- 1802219
- Alternate Identifier(s):
- OSTI ID: 1659533
- Grant/Contract Number:
- SC0011632; de-sc0011632
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Journal of Mathematical Physics
- Additional Journal Information:
- Journal Volume: 61; Journal Issue: 9; Journal ID: ISSN 0022-2488
- Publisher:
- American Institute of Physics (AIP)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 97 MATHEMATICS AND COMPUTING; Physics; Gauge group; Quantum field theory; Differential geometry; Algebraic structures; Conformal algebra; Superconformal algebras; Lagrangian field theories; Particle symmetry; Supersymmetric gauge theory; Operator product expansion
Citation Formats
Dedushenko, Mykola, and Fluder, Martin. Chiral algebra, localization, modularity, surface defects, and all that. United States: N. p., 2020.
Web. doi:10.1063/5.0002661.
Dedushenko, Mykola, & Fluder, Martin. Chiral algebra, localization, modularity, surface defects, and all that. United States. https://doi.org/10.1063/5.0002661
Dedushenko, Mykola, and Fluder, Martin. Fri .
"Chiral algebra, localization, modularity, surface defects, and all that". United States. https://doi.org/10.1063/5.0002661. https://www.osti.gov/servlets/purl/1802219.
@article{osti_1802219,
title = {Chiral algebra, localization, modularity, surface defects, and all that},
author = {Dedushenko, Mykola and Fluder, Martin},
abstractNote = {We study the 2D vertex operator algebra (VOA) construction in 4D N = 2 superconformal field theories on S3 × S1, focusing on both old puzzles and new observations. The VOA lives on a two-torus T 2 ⊂ S 3 × S 1 , it is 1 2 Z -graded, and this torus is equipped with the natural choice of spin structure (1,0) for the Z + 1 2 -graded operators, corresponding to the NS sector vacuum character. By analyzing the possible refinements of the Schur index that preserves the VOA, we find that it admits discrete deformations, which allows access to the remaining spin structures (1,1), (0,1), and (0,0), of which the latter two involve the inclusion of a particular surface defect. For Lagrangian theories, we perform the detailed analysis: we describe the natural supersymmetric background, perform localization, and derive the gauged symplectic boson action on a torus in any spin structure. In the absence of flavor fugacities, the 2D and 4D path integrals precisely match, including the Casimir factors. We further analyze the 2D theory: we identify its integration cycle and the two-point functions and interpret flavor holonomies as screening charges in the VOA. Next, we make some observations about modularity; the T-transformation acts on our four partition functions and lifts to a large diffeomorphism on S3 × S1. More interestingly, we generalize the four partition functions on the torus to an infinite family labeled by both the spin structure and the integration cycle inside the complexified maximal torus of the gauge group. Members of this family transform into one another under the full modular group, and we confirm the recent observation that the S-transform of the Schur index in Lagrangian theories exhibits logarithmic behavior. Finally, we comment on how locally our background reproduces the Ω-background.},
doi = {10.1063/5.0002661},
journal = {Journal of Mathematical Physics},
number = 9,
volume = 61,
place = {United States},
year = {Fri Sep 11 00:00:00 EDT 2020},
month = {Fri Sep 11 00:00:00 EDT 2020}
}
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