Complex Langevin simulation for QCD-like models

Understand

We first test the Complex Langevin method (CLE) on various simple models.

• We then introduce the method of Gauge Cooling to control the dynamics of the process and ensure thin distributions in the imaginary direction.
• We finally apply CLE with gauge cooling to a QCD-related lattice model (HQCD) and compare the results by CLE and by a refined Reweighting method (rRW).
• Very good agreement is found in all regions of physical interest.