PIRSA:25100196

1/2-BPS line defects in 4d N = 2 SQFTs via Cohomological Hall algebras

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}}
          }

Nikita Grygoryev Perimeter Institute for Theoretical Physics

Talk numberPIRSA:25100196
DOI10.48660/25100196
Collection
Talk Type Conference

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.