Name: Workshop on the sign problem in QCD and beyond
Start: 2025-01-20T11:00:00+01:00
End: 2025-01-24T13:00:00+01:00
Location: University of Bern

Workshop on the sign problem in QCD and beyond

from Monday 20 January 2025 (11:00) to Friday 24 January 2025 (13:00)

Monday 20 January 2025

11:00

11:00 - 12:30
Room: Lecture Hall 099 (ExWi Building)

12:30 Lunch Break
Lunch Break
12:30 - 13:30
13:30
13:30 - 13:45
Room: Lecture Hall 099 (ExWi Building)
Contributions

13:30 Welcoming notes - Urs Wenger (University of Bern)
13:45
13:45 - 15:30
Room: Lecture Hall 099 (ExWi Building)
Contributions

13:45 Easing the sign problem in many-body physics - Jens Eisert

14:30 Lattice QCD sign problem as an inverse problem - Francesco Di Renzo
15:30 Coffee Break
Coffee Break
15:30 - 16:00
Room: Lecture Hall 099 (ExWi Building)
16:00
16:00 - 17:45
Room: Lecture Hall 099 (ExWi Building)
Contributions

16:00 Minimal pole representation and controlled analytic continuation of Matsubara response functions - Emanuel Gull

16:45 QCD deconfinement transition line up to $\mu_B=400$~MeV from finite volume lattice simulations - Ludovica Pirelli (Bergische Universität Wuppertal)
18:00

18:00 - 20:00
Room: Lobby (ExWi Building)
Tuesday 21 January 2025
08:30
08:30 - 10:15
Room: Lecture Hall 099 (ExWi Building)
Contributions

08:30 Complex instanton gas approximation for the Hubbard model away of half-filling - Maksim Ulybyshev (University of Wuerzburg)

09:15 Convex methods for sign problems - Scott Lawrence (Los Alamos National Laboratory)
10:15 Coffee Break
Coffee Break
10:15 - 10:45
Room: Lecture Hall 099 (ExWi Building)
10:45
10:45 - 12:30
Room: Lecture Hall 099 (ExWi Building)
Contributions

10:45 Phase Diagram of the Schwinger Model by Adiabatic Preparation of States on a Quantum Simulator - Oleg Kaikov (Université Paris-Saclay, CEA-List)

11:30 BBGKY hierarchy for zero noise extrapolation in quantum error mitigation - Theo Saporiti (Université Paris-Saclay)
12:30 Lunch Break
Lunch Break
12:30 - 13:30
13:30
13:30 - 15:45
Room: Lecture Hall 099 (ExWi Building)
Contributions

13:30 Prospects for Quantum Simulations of the Strong Coupling Expansion - Wolfgang Unger

14:15 Correlated Cluster Algorithms - Thea Budde (ETH Zürich)

15:00 Abelian Gauge Theories in 1+1D with Correlated Cluster Algorithms - Joao C. Pinto Barros (Institute for Theoretical Physics, ETH Zurich)
15:45 Coffee Break
Coffee Break
15:45 - 16:15
Room: Lecture Hall 099 (ExWi Building)
16:15
16:15 - 18:00
Room: Lecture Hall 099 (ExWi Building)
Contributions

16:15 Wormhole quantum Monte Carlo for quantum dissipative spin systems - Manuel Weber (TUDresden)

17:00 Rotating gluodynamics and QCD: sign problem, mixed inhomogeneous phase and moment of inertia - Artem Roenko (JINR)
Wednesday 22 January 2025
08:30
08:30 - 10:15
Room: Lecture Hall 099 (ExWi Building)
Contributions

08:30 The Ising Model on a Curved Manifold -- The Affine Conjecture - Richard Brower (Boston University)

09:15 How many states are gauge invariant? - Alessandro Mariani
10:15 Coffee Break
Coffee Break
10:15 - 10:45
Room: Lecture Hall 099 (ExWi Building)
10:45
10:45 - 12:30
Room: Lecture Hall 099 (ExWi Building)
Contributions

10:45 Sign-blessed thermodynamics of interacting fermions - Nikolay Prokofiev (University of Massachusetts Amherst)

11:30 Homotopic Action: A Pathway to Convergent Diagrammatic Theories - Boris Svistunov (University of Massachusetts Amherst)
12:30 Lunch Break
Lunch Break
12:30 - 14:00
14:00
14:00 - 15:45
Room: Lecture Hall 099 (ExWi Building)
Contributions

14:00 Sign Problem Free Qubit Regularized Hamiltonian Lattice Gauge Theories - Shailesh Chandrasekharan (Duke University)

14:45 Confronting the sign problem for frustrated magnets - Fakher Assaad
15:45 Coffee Break
Coffee Break
15:45 - 16:15
Room: Lecture Hall 099 (ExWi Building)
16:15
16:15 - 17:30
Room: Lecture Hall 099 (ExWi Building)
Contributions

16:15 Following Uwe-Jens' Journey of Major Discoveries - Wolfgang Bietenholz

17:00 Personal reflections - Shailesh Chandrasekharan
18:30

18:30 - 22:30
Thursday 23 January 2025
08:30
08:30 - 10:15
Room: Lecture Hall 099 (ExWi Building)
Contributions

08:30 Kernels and integration cycles in complex Langevin simulations - Michael Mandl (University of Graz)

09:15 Machine learning kernels in complex Langevin for real time evolution - Enno Carstensen (University of Graz)
10:15 Coffee Break
Coffee Break
10:15 - 10:45
Room: Lecture Hall 099 (ExWi Building)
10:45
10:45 - 12:30
Room: Lecture Hall 099 (ExWi Building)
Contributions

10:45 Enhancing Complex Langevin with Lefschetz Thimble-Based Regularizations - Paul Hotzy (TU Wien)

11:30 System specific prior knowledge - a key tool to tackle the sign problem - Alexander Rothkopf (University of Stavanger)
12:30 Lunch Break
Lunch Break
12:30 - 14:00
14:00
14:00 - 15:45
Room: Lecture Hall 099 (ExWi Building)
Contributions

14:00 Constant path integral contour shifts - Johann Ostmeyer (University of Bonn)

14:45 Contour optimisation for the sign problem with an efficient evaluation of the Jacobian - Michael Kroyter (Holon Institute of Technology)
15:45 Coffee Break
Coffee Break
15:45 - 16:15
Room: Lecture Hall 099 (ExWi Building)
16:15
16:15 - 18:00
Room: Lecture Hall 099 (ExWi Building)
Contributions

16:15 Quantum Computing for Lattice Field Theory - Lena Funcke (University of Bonn)

17:00 Variational Quantum Eigensolver for (2+1)-Dimensional QED at Finite Density - Emil Otis Rosanowski
Friday 24 January 2025
08:30
08:30 - 10:15
Room: Lecture Hall 099 (ExWi Building)
Contributions

08:30 Testing dynamical stabilization of Complex Langevin simulations of QCD - Dénes Sexty

09:15 Diffusion models for complex Langevin dynamics - Gert Aarts (Swansea University)
10:15 Coffee Break
Coffee Break
10:15 - 10:45
Room: Lecture Hall 099 (ExWi Building)
10:45
10:45 - 12:15
Room: Lecture Hall 099 (ExWi Building)
Contributions

10:45 External and Dynamic Gauge Fields in Strong-Field QED - Óscar Amaro (GoLP/Instituto de Plasmas e Fusão Nuclear, Instituto Superior Técnico, Universidade de Lisboa, 1049-001 Lisbon, Portugal)

11:30 Towards Real-Time Observables from First Principles: Correlators in 3+1D Yang-Mills Theory - Kirill Boguslavski (TU Wien (AT))
12:15

12:15 - 12:30
Room: Lecture Hall 099 (ExWi Building)

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