10.1103/PhysRevD.68.014507
Allton, C. R
C. R
Allton
Ejiri, S.
S.
Ejiri
Hands, S. J
S. J
Hands
Kaczmarek, Olaf
Olaf
Kaczmarek
Karsch, Frithjof
Frithjof
Karsch
Laermann, Edwin
Edwin
Laermann
Schmidt, Christian
Christian
Schmidt
The Equation of state for two flavor QCD at nonzero chemical potential
2003
2011-01-19T16:18:30Z
2018-07-24T13:00:09Z
journal_article
https://pub.uni-bielefeld.de/record/1968881
https://pub.uni-bielefeld.de/record/1968881.json
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.