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Equation of state for two flavor QCD at nonzero chemical potential
Equation of state for two flavor QCD at nonzero chemical potential
Allton, C.R.
16043
Ejiri, S.
16044
Hands, S.J.
16045
Kaczmarek, O.
16046
Karsch, F.
16047
Laermann, E.
16048
Schmidt, C.
16049
We present results of a simulation of QCD on a 16 3 ×4 lattice with 2 continuum flavors of a p4 -improved staggered fermion with mass m/T=0.4. Derivatives of the thermodynamic grand potential Ω with respect to the quark chemical potential μ q up to fourth order are calculated, enabling estimates of the pressure, quark number density and associated susceptibilities as functions of μ q via Taylor series expansion. Discretization 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 Ω with respect to the bare couplings and quark masses.
journal article
American Physical Society
2003-07
application/pdf
Physical Review D
1
68
014507
Physical Review D
AA00773624
15507998
https://niigata-u.repo.nii.ac.jp/record/2343/files/68_1_014507.pdf
eng
info:doi/10.1103/PhysRevD.68.014507
(C) 2003 American Physical Society