Towards the equation of state in 2+1 flavor QCD with improved Wilson quarks in the fixed scale approach

Abstract

We report on the status of our study towards the equation of state in 2+1 flavor QCD with improved Wilson quarks. To reduce the computational cost which is quite demanding for Wilson-type quarks, we adopt the fixed scale approach, i.e. the temperature T is varied by N_t at fixed lattice spacing. Since the conventional integral method to obtain the pressure is inapplicable at a fixed scale, we adopt the "T-integral method", to calculate the pressure non-perturbatively. Reduction of the computational cost of T=0 simulations thus achieved is indispensable to study EOS in QCD with dynamical quarks.

arXiv comment8 pages, poster presented at The XXVII International Symposium on Lattice Field Theory (Lattice 2009), July 26-31 2009, Peking University, Beijing, China