Nonperturbative QFT in the complex momentum space

Session

Thursday Morning Session 1

15 Jun 2023, 09:15

Physics and Chemistry Theatre (PCT) (Maynooth University)

1. Spectral reconstruction with Gaussian processes

Julian Urban

15/06/2023, 09:15

Talk

By extending standard Gaussian process regression to inference from indirect observations, one obtains a powerful non-parametric algorithm for the probabilistic treatment of ill-conditioned linear inverse problems. This makes it a promising ansatz for Fredholm integral inversion, of which the spectral reconstruction of correlation functions in quantum field theory is a particular instance. The...

8. Spectral reconstruction from lattice correlator

Dibyendu Bala (Bielefeld University)

15/06/2023, 10:00

Talk

In this talk, I will discuss spectral reconstruction from various lattice correlators, with a primary focus on spectral reconstruction related to photon production rates.

Thermal photons are a vital tool for studying the Quark-Gluon Plasma (QGP). The photon production rate from the plasma at temperature is proportional to the transverse spectral function $\rho_T(\omega,\vec k)$. The photon...