Tue·Nov 20, 2001Tuesday·November 20, 2001

1. 01*

   Performance studies of the two-step multiboson algorithm in compact lattice QED

   I.L. Bogolubsky🇷🇺 · V.K. Mitrjushkin🇷🇺 · I. Montvay🇩🇪 · M. Mueller-Preussker🇩🇪 · N.V. Zverev🇩🇪

   The performance of the two-step multiboson (TSMB) algorithm is investigated in comparison with the hybrid Monte Carlo (HMC) method for compact lattice QED with standard Wilson fermions both in the Coulomb and confinement phases. The restriction to QED allows for extensive measurements of autocorrelation times. Preliminary results show that the TSMB algorithm is at least competitive with standard HMC.

   hep-latNucl.Phys.B Proc.Suppl.(2002)·2 citations
2. 02*

   Study of the SU(2) High Density System with Wilson Fermion

   S. Muroya🇯🇵 · A. Nakamura🇯🇵 · C. Nonaka🇯🇵

   We investigate high density state of SU(2) QCD in the case of the Wilson fermions with Iwasaki improved action. Based on the Woodbery formula, the ratio of fermion determinants is evaluated at each step of the Metropolis link update. At $\beta =0.7$, for $\kappa =0.150$, and $\kappa =0.175$, we calculate thermodynamical quantities, such as, baryon number density, Polyakov line, and the energy density of gluon sector with chemical potential $\mu$=0 to 0.9 on the $4^3\times 8$ lattice. The susceptibility of the Polyakov line to the chemical potential shows peak at around $\mu =0.7$ which indicates the deconfinement phase transition. Behavior of the meson and diquark propagators with finite chemical potential are also investigated at both side of the peak.

   hep-latNucl.Phys.B Proc.Suppl.(2002)·2 citations

* Reconstructed cohort: no mailing for this day survives in the archive. Papers are grouped by their submission times and arXiv's announcement cut-off, assuming announcement without delay; positions follow identifier order. Validated at ~91% exact-day agreement against the archived era.