E. Laermann

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The pressure and the energy density of the SU(3) gauge theory are calculated on lattices with temporal extent N τ = 4, 6 and 8 and spatial extent N σ = 16 and 32. The results are then extrapolated to the continuum limit. In the investigated temperature range up to five times T c we observe a 15% deviation from the ideal gas limit. We also present new(More)
We calculate the pressure in QCD with two and three light quarks on a lattice of size 16 3 × 4 using tree level improved gauge and fermion actions. We argue that for temperatures T > ∼ 2T c systematic effects due to the finite lattice cutoff and non-vanishing quark masses are below 15% in this calculation and give an estimate for the continuum extrapolated(More)
The separation of a heavy quark and antiquark pair leads to the formation of a tube of flux, or string, which should break in the presence of light quark-antiquark pairs. This expected zero temperature phenomenon has proven elusive in simulations of lattice QCD. We present simulation results that show that the string does break in the confining phase at(More)
We calculate the string tension, deconfinement transition temperature and bulk thermodynamic quantities of the SU(3) gauge theory using tree level and tadpole improved actions. Finite temperature calculations have been performed on lattices with temporal extent N τ = 3 and 4. Compared to calculations with the standard Wilson action on this size lattices we(More)
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We present results of a simulation of QCD on a 16 3 × 4 lattice with 2 continuum flavors of p4-improved staggered fermion with mass m/T = 0.4. Derivatives of the thermodynamic grand potential Ω with respect to quark chemical potential µ q up to fourth order are calculated, enabling estimates of the pressure, quark number density and associated(More)
We determine the second order endpoint of the line of first order phase transitions, which occur in the light quark mass regime of 3-flavour QCD at finite temperature, and analyze universal properties of this chiral critical point. A detailed analysis of Binder cumulants and the joint probability distributions of energy like and ordering-field like(More)
Through a detailed investigation of the SU(3) gauge theory at finite temperature on lattices of various size we can control finite lattice cutoff effects in bulk ther-modynamic quantities. We calculate the pressure and energy density of the SU(3) gauge theory on lattices with temporal extent N τ = 4, 6 and 8 and spatial extent N σ = 16 and 32. The results(More)