Canonical partition function and finite density phase transition in lattice QCD

By S. Ejiri. 2008

152 citations recorded by the source corpus.

We discuss the nature of the phase transition for lattice QCD at finite temperature and density. We propose a method to calculate the canonical partition function by fixing the total quark number introducing approximations allowed in the low density region. An effective potential as a function of the quark number density is discussed from the canonical partition function. We analyze data obtained in a simulation of two-flavor QCD using p4-improved staggered quarks with bare quark mass $m/T=0.4$ on a ${16}^{3}\ifmmode\times\else\texttimes\fi{}4$ lattice. The results suggest that the finite density phase transition at low temperature is of first order.

Subfields: Nuclear and High Energy Physics

View Paper: https://www.semanticscholar.org/paper/9120d08e5aac5ee205079dfee59d4433d7b962c0

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In Nuclear and High Energy Physics

Citations in the corpus

The phase diagram of dense QCD (2010, methodology): “In [148] the canonical partition function is extracted using the density of states method with an assumption of the Gaussian distribution of the phase θ of the Dirac determinant.”
The QCD phase diagram from analytic continuation (2015, methodology): “Attempts to reach non-vanishing μB on the lattice include reweighting of the generated configurations [9–13], Taylor expansion in μ [14–18], analytic continuation from imaginary μ [19–26], use of the canonical ensemble [27–29] and density of state methods [30,31].”