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We investigate 2-colour QCD with 2 flavours of Wilson fermion at nonzerotemperature T and quark chemical potential mu, with a pion mass of 700 MeV(m_pi/m_rho=0.8). From temperature scans at fixed mu we find that the criticaltemperature for the superfluid to normal transition depends only very weakly onmu above the onset chemical potential, while the deconfinement crossovertemperature is clearly decreasing with mu. We find indications of a region ofsuperfluid but deconfined matter at high mu and intermediate T. The staticquark potential determined from the Wilson loop is found to exhibit a 'stringtension' that increases at large mu in the 'deconfined' region. The electric(longitudinal) gluon propagator in Landau gauge becomes strongly screened withincreasing temperature and chemical potential. The magnetic (transverse) gluonshows little sensitivity to temperature, and exhibits a mild enhancement atintermediate mu before becoming suppressed at large mu.

Phase transitions and gluodynamics in 2-colour matter at high density