Calculating the EoS of the dense quark-gluon plasma using the Complex Langevin equation

Understand

The pressure and energy density of the quark-gluon plasma at finite baryon chemical potential are calculated using the Complex Langevin equation.

• The stout smearing procedure is generalized for the SL(3,$\mathcal{C}$) manifold allowing the usage of an improved action in the Complex Langevin setup.
• Four degenerate flavors of staggered quarks with $m_\pi=500-700$ MeV are used with a tree-level Symanzik improved gauge action on $16^3 \times 8 $ lattices.
• Results are compared to the Taylor expansion and good agreement is found for small chemical potentials.