Lattice gauge theory of Two-Color QCD (QC_2D) in non-zero baryon density
offers a glimpse on the properties of QCD in baryon rich
environment since it is free from the "complex action" problem of QCD.
Recently, we have calculated heavy quarkonium correlators using lattice
Non-Relativistic Two-Color QCD in non-zero baryon density. We found that
as the quark chemical potential $\mu$ is varied, there exist three
distinct regimes of S-wave heavy quarkonium mas, which is in agreement
with our previous finding for non-zero baryon density QC_2D phases:
BEC, BCS and deconfined.