Record link: 
http://hdl.handle.net/20.500.12708/193305
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Title: 
Stabilizing complex Langevin for real-time gauge theory
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Citation: 
Boguslavski, K., Hotzy, P., & Müller, D. (2023, March). Stabilizing complex Langevin for real-time gauge theory [Poster Presentation]. 11th International Conference on Hard and Electromagnetic Probes of High-Energy Nuclear Collisions: Hard Probes 2023 (HP2023), Aschaffenburg, Germany. http://hdl.handle.net/20.500.12708/193305
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Publication Type: 
Presentation - Poster Presentation
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Language: 
English
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Authors: 
Boguslavski, Kirill 
Hotzy, Paul 
Müller, David 
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Organisational Unit: 
E136 - Institut für Theoretische Physik 
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Date (published): 
Mar-2023
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Event name: 
11th International Conference on Hard and Electromagnetic Probes of High-Energy Nuclear Collisions: Hard Probes 2023 (HP2023) 
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Event date: 
26-Mar-2023 - 31-Mar-2023
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Event place: 
Aschaffenburg, Germany
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Keywords: 
Lattice QCD; Complex Langevin; Gauge theory
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Research facilities: 
Vienna Scientific Cluster 
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Project title: 
Nichtperturbative Eigenschaften evolvierenden gluonischer Plasmen: P 34455-N (FWF - Österr. Wissenschaftsfonds) 
Simulation der frühesten Stadien von Schwerionenkollisionen: P 34764-N (FWF - Österr. Wissenschaftsfonds) 
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Link (external): 
https://indico.uni-muenster.de/event/1409/contributions/2183/
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Additional information: 
Direct computations of QCD real-time observables like transport coefficients are very difficult due to the infamous sign problem. The complex Langevin (CL) method is a promising approach to overcome it by using a real-time formulation of QCD on a complex time contour. Studying SU() gauge theories with CL, we find that current stabilization techniques are insufficient to obtain correct results. Therefore, we introduce a novel anisotropic kernel that enables CL simulations on discretized time contours. Applying it to SU(2) pure gauge theory in 3+1 dimensions, we obtain unprecedentedly stable results that may allow us to calculate real-time observables from first principles in the near future.
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Research Areas: 
Modeling and Simulation: 100%
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Science Branch: 
1030 - Physik, Astronomie: 100%
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