Applying constrained simulations for low temperature lattice QCD at finite baryon chemical potential

Abstract

We study the density of states method as well as reweighting to explore the low temperature phase diagram of QCD at finite baryon chemical potential. We use four flavors of staggered quarks, a tree-level Symanzik improved gauge action and four stout smearing steps on lattices with $N_s=4,6,8$ and $N_t=6-16$. We compare our results to that of the phase quenched ensemble and also determine the pion and nucleon masses. In the density of states approach we applied pion condensate or gauge action density fixing. We found that the density of states method performs similarly to reweighting. At $T\approx 100$ MeV, we found an indication of the onset of the quark number density at around $\mu /m_N\sim 0.16-0.18$ on $6^4$ lattices at $\beta =2.9$.

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Cited by in corpus (7)

• Lattice simulations of the QCD chiral transition at real baryon density
• Dynamical stabilisation of complex Langevin simulations of QCD
• Topological susceptibility of pure gauge theory using Density of States
• Equation of state of a hot-and-dense quark gluon plasma: lattice simulations at real ${\mu }_B$ vs. extrapolations
• Complex Langevin calculations in QCD at finite density
• Exponential reduction of the sign problem at finite density in the 2+1D XY model via contour deformations
• On the validity of the complex Langevin method near the deconfining phase transition in QCD at finite density