Workshop on the sign problem in QCD and beyond

System specific prior knowledge - a key tool to tackle the sign problem

23 Jan 2025, 11:30

45m

Lecture Hall 099 (ExWi Building) (University of Bern)

talk Thursday morning

Speaker

Dr Alexander Rothkopf (University of Stavanger)

Description

Here I present our recently developed strategy to exploit system specific prior knowledge [1], such as space-time symmetries, as a loophole to the computational challenge posed by NP-hard sign problems. As explicit example, I will showcase how complex Langevin simulations of strongly coupled scalar fields [2] can be amended with relevant prior information using learned kernels. Developments towards preservation of space-time symmetries in numerical simulations [3] will be discussed.

[1] D. Alvestad, R. Larsen, A.R. JHEP 04 (2023) 057 [arXiv:2211.15625]
[2] D. Alvestad, A.R., D. Sexty PRD Letter 109 (2024) 3, L031502 [arXiv:2310.08053]
[3] A.R., W.A. Horowitz, J. Nordström [arXiv: 2404.18676]

Presentation materials

Sign_Rothkopf_FINAL_WEB.pdf