TY - JOUR
AB - We present results of a simulation of QCD on a 4x16^3 lattice with 2 continuum flavors of p4-improved staggered fermion with mass m/T=0.4. Derivatives of the thermodynamic grand potential with respect to quark chemical potential mu_q up to fourth order are calculated, enabling estimates of the pressure, quark number density and associated susceptibilities as functions of mu_q via Taylor series expansion. Discretisation effects associated with various staggered fermion formulations are discussed in some detail. In addition it is possible to estimate the radius of convergence of the expansion as a function of temperature. We also discuss the calculation of energy and entropy densities which are defined via mixed derivatives of the thermodynamic grand potential with respect to the bare couplings and quark masses.
AU - Allton, C. R
AU - Ejiri, S.
AU - Hands, S. J
AU - Kaczmarek, Olaf
AU - Karsch, Frithjof
AU - Laermann, Edwin
AU - Schmidt, Christian
ID - 1968881
IS - 1
JF - Phys.Rev. D
KW - pressure
KW - 11.15.Ha
KW - 05.70.Ce
KW - potential: chemical
KW - numerical calculations: Monte Carlo
KW - lattice field theory: action
KW - Lattice
KW - gauge field theory: SU(3)
KW - flavor: 2
KW - fermion number: density
KW - thermodynamics
KW - susceptibility
KW - fermion: lattice field theory
KW - entropy: density
KW - energy: density
KW - 12.38.Gc
KW - 12.38.Mh
SN - 0556-2821
TI - The Equation of state for two flavor QCD at nonzero chemical potential
VL - 68
ER -