PIRSA:25100196 Conference

DOI10.48660/25100196

Conference/School: Perimeter Graduate Conference 2025

Grygoryev, N. (2025). 1/2-BPS line defects in 4d N = 2 SQFTs via Cohomological Hall algebras. Perimeter Institute. https://pirsa.org/25100196

Grygoryev, Nikita. 1/2-BPS line defects in 4d N = 2 SQFTs via Cohomological Hall algebras. Perimeter Institute, Oct. 16, 2025, https://pirsa.org/25100196 

@misc{ pirsa_PIRSA:25100196,
  doi = {10.48660/25100196},
  url = {https://pirsa.org/25100196},
  author = {Grygoryev, Nikita},
  keywords = {},
  language = {en},
  title = {1/2-BPS line defects in 4d N = 2 SQFTs via Cohomological Hall algebras},
  publisher = {Perimeter Institute},
  year = {2025},
  month = {oct},
  note = {PIRSA:25100196 see, \url{https://pirsa.org}}
}

Abstract

After a brief reminder/introduction of relevant facts about 4d N=2 SQFTs (BPS things, twisting, wall-crossing, line defects) I will try to sketch our proposal for the category of 1/2-BPS line defects in terms of certain bimodules over Cohomological Hall algebra of the BPS quiver; maybe even say a few words about why we believe it is a correct thing to do.

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