Towards corrections to the strong coupling limit of staggered lattice QCD

Abstract

We report on the first steps of an ongoing project to add gauge observables and gauge corrections to the well-studied strong coupling limit of staggered lattice QCD, which has been shown earlier to be amenable to numerical simulations by the worm algorithm in the chiral limit and at finite density. Here we show how to evaluate the expectation value of the Polyakov loop in the framework of the strong coupling limit at finite temperature, allowing to study confinement properties along with those of chiral symmetry breaking. We find the Polyakov loop to rise smoothly, thus signalling deconfinement. The non-analytic nature of the chiral phase transition is reflected in the derivative of the Polyakov loop. We also discuss how to construct an effective theory for non-zero lattice coupling, which is valid to $O(\beta )$.

7 pages, 4 figures, Talk presented at the XXIX International Symposium on Lattice Field Theory, Lattice2011, Squaw Valley, Lake Tahoe, California, July 2011

References in corpus (4)

• The QCD phase diagram at nonzero quark density
• Nuclear Physics from lattice QCD at strong coupling
• Continuous Time Monte Carlo for Lattice QCD in the Strong Coupling Limit
• Strong-coupling lattice study for QCD phase diagram including both chiral and deconfinement dynamics

Cited by in corpus (4)

• Monte Carlo simulation of the SU(3) spin model with chemical potential in a flux representation
• Worm algorithms for the 3-state Potts model with magnetic field and chemical potential
• Lattice gauge theory without link variables
• Abelian color cycles: a new approach to strong coupling expansion and dual representations for non-abelian lattice gauge theory