The $N_t=6$ equation of state for two flavor QCD

Bernard, C.; Blum, T.; DeTar, C.; Gottlieb, Steven; Heller, U. M.; Hetrick, J. E.; Karkkainen, L.; Rummukainen, K.; Sugar, R.; Toussaint, D.; Wingate, M.

The $N_t=6$ equation of state for two flavor QCD

Authors

Description

We improve the calculation of the equation of state for two flavor QCD by simulating on $N_t=6$ lattices at appropriate values of the couplings for the deconfinement/chiral symmetry restoration crossover. For $am_q=0.0125$ the energy density rises rapidly to approximately 1 ${\rm GeV/fm^3}$ just after the crossover($m_π/m_ρ\approx 0.4$ at this point). Comparing with our previous result for $N_t=4$~\cite{eos}, we find large finite $N_t$ corrections as expected from free field theory on finite lattices. We also provide formulae for extracting the speed of sound from the measured quantities.
Contribution to Lattice 95 proceedings (combines talks presented by T. Blum and L. Karkkainen). LaTeX, 8 pages, uses espcrc2.sty, postscript figures included