Bulk and spectral observables in lattice QCD

We review recent developments in lattice simulations of the equation of state, the order of the thermal phase transition and the determination of the pseudo-critical temperature in (2+1)-flavour QCD. Owing to the increasing computer power, new algorithms and improved fermion formulations, studies of bulk QCD matter approach the stage of precision science. We have also reviewed recent lattice results on the spectral properties of the heavy quarkoniums inside the quark–gluon plasma (QGP). Although they are still at an exploratory stage, interesting physics in relation with the strongly correlated QGP is being extracted.