Computing Quantum Gravity Workshop

May 5, 2025, 8:00 a.m. → May 9, 2025, 5:00 p.m. America/Toronto

Perimeter Institute for Theoretical Physics

A key task for many quantum gravity approaches is the development of effective numerical tools, in order to be able to extract physical predictions. This does apply in particular to approaches focusing on the Lorentzian path integral / Lorentzian spacetimes. The main aim of the workshop is to learn and develop methods to deal with Lorentzian signature. This will be a hands-on workshop, where projects will be pursued in small groups.

Mon, May 5

8:30 a.m. → 9:30 a.m. Registration

9:30 a.m. → 12:30 p.m. Morning Presentations

Bianca Dittrich: Calculating the perturbative continuum limit of Area Regge and Effective spin foams on a lattice
Jose Padua-Arguelles: Algorithms for Regge calculus and applications to entropy calculations and the replica paradigm

Speakers: Bianca Dittrich (Perimeter Institute for Theoretical Physics), José de Jesús Padua Argüelles (Perimeter Institute for Theoretical Physics)

12:30 p.m. → 2:00 p.m. Lunch Break

2:00 p.m. → 5:00 p.m. Afternoon presentations, discussions, unconference

Seth Asante: Solving lengths in terms of areas (Solving systems of polynomial equations efficiently)
Bianca Dittrich: Accelerating the convergence of series techniques
Everyone: Discussions, projects, unconference

Speakers: Bianca Dittrich (Perimeter Institute for Theoretical Physics), Seth Kurankyi Asante (Friedrich Schiller University Jena)

3:30 p.m. → 4:00 p.m. Coffee Break

Tue, May 6

9:30 a.m. → 12:30 p.m. Morning presentations

Hongguang Liu: Lefschetz thimbles, Markov-Chain Monte Carlo Methods and applications to spin foams.
Dongxue Qu: Application of Lefschetz thimble MC to Regge

Speakers: Dongxue Qu (Perimeter Institute for Theoretical Physics), Hongguang Liu (University of Erlangen-Nuremberg)

12:30 p.m. → 2:00 p.m. Lunch Break

2:00 p.m. → 5:00 p.m. Afternoon presentations, discussions, unconference

Seth Asante: Using tensor network contraction techniques for efficient evaluation of spin foam amplitudes
Everyone: Discussions, projects, unconference

Speaker: Seth Kurankyi Asante (Friedrich Schiller University Jena)

3:30 p.m. → 3:50 p.m. Coffee Break

6:00 p.m. → 8:00 p.m. Banquet

Wed, May 7

9:30 a.m. → 12:30 p.m. Morning presentations

Neural network ansatz for solving the Wheeler DeWitt equation (in LQG) [ONLINE]

Speakers: Hanno Sahlmann, Waleed Sherif (Univ. of Erlangen)

12:30 p.m. → 2:00 p.m. Lunch Break

2:00 p.m. → 5:00 p.m. Discussions, projects, unconference

3:00 p.m. → 3:20 p.m. Coffee Break

Thu, May 8

9:30 a.m. → 12:30 p.m. Morning presentations

Monte Carlo for (Causal) Dynamical Triangulations and fighting critical slow-down

Speakers: Jesse van der Duin, Marc Schiffer

12:30 p.m. → 2:30 p.m. Lunch Break

2:30 p.m. → 3:30 p.m. Quantum Gravity Seminar

Speaker: Dongxue Qu (Perimeter Institute for Theoretical Physics)

3:30 p.m. → 3:50 p.m. Coffee Break

Fri, May 9

9:30 a.m. → 11:30 a.m. How to use ChatGPT for programming

Speaker: Selim Hotinli (Perimeter Institute for Theoretical Physics)

11:30 a.m. → 12:30 p.m. Using AI for computing

Volunteers

12:30 p.m. → 2:30 p.m. Lunch Break

2:00 p.m. → 4:00 p.m. Discussions, projects, unconference

3:30 p.m. → 3:50 p.m. Coffee Break