Finite Density Simulations with Canonical Ensemble

Abstract

QCD at non-zero baryon density is expected to have a critical point where the zero-density cross-over turns into a first order phase transition. To identify this point we scan the density-temperature space using a canonical ensemble method. For a given temperature, we plot the chemical potential as a function of density looking for an "S-shape" as a signal for a first order transition. We carried out simulations using Wilson fermions with $m_{\pi }\approx 1GeV$ on $6^3\times 4$ lattices. As a benchmark, we ran four flavors simulations where we observe a clear signal. In the two flavors case we do not see any signal for temperatures as low as $0.83T_c$. Preliminary results for the three flavor case are also presented.

7 pages, 7 figures, Talk given at the XXVI International Symposium on Lattice Field Theory, July 14 - 19 2008, Williamsburg, Virginia, USA

References in corpus (5)

• Canonical partition function and finite density phase transition in lattice QCD
• Lattice QCD at finite density via a new canonical approach
• Finite density simulations using a determinant estimator
• New results using the canonical approach to finite density QCD
• A Finite Baryon Density Algorithm

Cited by in corpus (9)

• The phase diagram of dense QCD
• Finite-density lattice QCD and sign problem: current status and open problems
• QCD Thermodynamics from the Lattice
• Study of QCD critical point using canonical ensemble method
• Canonical fermion determinants in lattice QCD - Numerical evaluation and properties
• Winding number expansion for the canonical approach to finite density simulations
• Towards extremely dense matter on the lattice
• Lattice QCD and dense quark matter
• Properties of canonical fermion determinants with a fixed quark number