Quark Density in Lattice QC$_2$D at Imaginary and Real Chemical Potential
2021
We study two-color QCD (QC$_2$D) with two flavors of staggered fermions at imaginary and real quark chemical potential $\mu_q$ and $T>T_c$. We employ various methods of analytic continuation of the quark number density from imaginary to real quark chemical potentials $\mu_q$ on the basis of the numerical results for imaginary $\mu_q$. At $T T_{RW}$ we see that the analytic continuation to the real values of $\mu_q$ based on trigonometric functions works equally well with the conventional method based on the Taylor expansion in powers of $\mu_q$.
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