An effective lattice calculation for heavy quarks at any Nc finds a first-order baryon onset and p~Nc scaling in the dense phase, consistent with quarkyonic matter, with continuum limits still out of reach.
Phase structures of strong coupling lattice QCD with finite baryon and isospin density
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abstract
Quantum chromodynamics (QCD) at finite temperature (T), baryon chemical potential (\muB) and isospin chemical potential (\muI) is studied in the strong coupling limit on a lattice with staggered fermions. With the use of large dimensional expansion and the mean field approximation, we derive an effective action written in terms of the chiral condensate and pion condensate as a function of T, \muB and \muI. The phase structure in the space of T and \muB is elucidated, and simple analytical formulas for the critical line of the chiral phase transition and the tricritical point are derived. The effects of a finite quark mass (m) and finite \muI on the phase diagram are discussed. We also investigate the phase structure in the space of T, \muI and m, and clarify the correspondence between color SU(3) QCD with finite isospin density and color SU(2) QCD with finite baryon density. Comparisons of our results with those from recent Monte Carlo lattice simulations on finite density QCD are given.
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QCD in the heavy dense regime for general $N_c$: On the existence of quarkyonic matter
An effective lattice calculation for heavy quarks at any Nc finds a first-order baryon onset and p~Nc scaling in the dense phase, consistent with quarkyonic matter, with continuum limits still out of reach.