Real-Time Simulation for High Energy Physics

by Ying-Ying Li

Thursday 25 Nov 2021, 14:30 → 16:30 Asia/Shanghai

High energy physics is facing challenges of e.g., understanding the origin of observed matter-antimatter asymmetry, the nature of dark matter. Scenarios to address those challenges often involve dynamics in Quantum Field Theory that at present cannot be solved due to computational or theoretical limitations. An elegant solution exist in the form of real-time simulation, albeit substantial theoretical issues and hardware developments are required. In the near Noisy Intermediate-Scale Quantum (NISQ) era, only shallow circuits for digital quantum devices can avoid overwhelming errors. In my talk, I will first motivate the critical need for real-time simulation by enumerating such outstanding problems. Then I will focus on leveraging classical lattice field theory to reduce the timescale for real-time simulation, which includes using improved hamiltonian to reduce the errors from the continuum limit, utilizing the methods from Euclidean calculations, e.g scale setting, background field method, analytical continuation to renormalize the trotterization errors. Finally, I will show the resources required following different trajectories to the continuum limit and advocate the fixed anisotropic trajectory.