Lattice2010

Session

Parallel 16: Nonzero temperature and density

15 Jun 2010, 10:30

Villasimius, Sardinia

190. Renormalized Polyakov loop in the Fixed Scale Approach

Rajiv V. Gavai (Tata Institute, Mumbai)

15/06/2010, 10:30

Nonzero temperature and density

I compute the deconfinement order parameter for the SU(2) lattice gauge theory, the Polyakov loop, using the fixed scale approach for several different scales and show how one can obtain a physical, renormalized, order parameter. The generalization to other gauge theories, including quenched or full QCD, is straightforward.

125. Deconfinement transition in QCD near the heavy quark limit

Hana Saito (University of Tsukuba)

15/06/2010, 10:50

We study the order of the deconfinement phase transition in QCD with Wilson quarks near the heavy quark limit. We identify the transition from the shape of an effective potential computed from the histogram of the plaquette. We find that the first order transition of the heavy quark limit gets weaker as the quark mass decreses and turns into a crossover at a finite quark mass. We...

117. Effective Polyakov-loop theory for pure Yang-Mills from strong coupling expansion: analytical details

Jens Langelage (University of Bielefeld)

15/06/2010, 11:10

Nonzero temperature and density

Lattice Yang-Mills theories at finite temperature can be mapped onto effective 3D Spin systems, thus facilitating their numerical investigation. Using strong coupling expansions we derive the effective action for Polyakov loops and investigate the effect of higher order corrections. Results and numerical details are discussed in the subsequent talk of Dr. Lottini.

83. Effective Polyakov-loop theory for pure Yang-Mills from strong coupling expansion: numerical aspects and conclusions

Stefano Lottini (Goethe-Universitaet, Frankfurt am Main)

15/06/2010, 11:30

Nonzero temperature and density

Within the Polyakov-loop effective theory for pure Yang-Mills obtained from a strong coupling expansion (as presented in Dr. Langelage's talk), a single simulation on a 3D system yields, in principle, a whole array of critical couplings for the full theory, at all values of $N_\tau$. Here we present the Monte Carlo details and the practical aspects of such approach, its results, and we discuss...

228. Finite temperature QCD at fixed Q with overlap fermions

Guido Cossu (KEK Theory Center)

15/06/2010, 11:50

Nonzero temperature and density

We present preliminary results of the recently started project of Finite Temperature QCD with overlap fermions al KEK. We started a series of simulations to assess the effects of fixing the topological sector and we will show the first calculations of thermodynamical observables and topological susceptibility.

248. N_f = 3 critical point from canonical ensemble

Keh-Fei Liu (University of Kentucky)

15/06/2010, 12:10

Nonzero temperature and density

Results on locating the critical point for QCD at N_f =3 with the canonical ensemble approach will be presented. An algorithm aimed at simulations on larger volumes will be discussed.