Nf=1 QCD simulation with improved gauge action at finite temperature

We study the deconfinement transition of $N_f=1$ QCD by the hybrid Monte Carlo algorithm with Wilson fermions. We calculate the Polyakov loop, its susceptibility and Binder cumulant and use the $\chi^2$ method to locate the phase transition point. Our results are similar to the previous results obtained by the multiboson algorithm.Comment: 3 pages, 3 figures: Lattice2003(Non-zero temperature and density

Higher Order Hybrid Monte Carlo at Finite Temperature

The standard hybrid Monte Carlo algorithm uses the second order integrator at the molecular dynamics step. This choice of the integrator is not always the best. Using the Wilson fermion action, we study the performance of the hybrid Monte Carlo algorithm for lattice QCD with higher order integrators in both zero and finite temperature phases and find that in the finite temperature phase the performance of the algorithm can be raised by use of the 4th order integrator.Comment: 13 pages, 6 figure

Hadronic property at finite density

We report on three topics on finite density simulations: (i) the derivative method for hadronic quantities, (ii) phase fluctuations in the vicinity of the critical temperature and (iii) the density of states method at finite isospin density.Comment: 11 pages, 11 figures, talk given at Finite Density QCD, at Nara, Japan 10-12 July 200