The phase diagram of a gauge theory with fermionic baryons

Abstract

The fermion-sign problem at finite density is a persisting challenge for Monte-Carlo simulations. Theories that do not have a sign problem can provide valuable guidance and insight for physically more relevant ones that do. Replacing the gauge group SU(3) of QCD by the exceptional group G2, for example, leads to such a theory. It has mesons as well as bosonic and fermionic baryons, and shares many features with QCD. This makes the G2 gauge theory ideally suited to study general properties of dense, strongly-interacting matter, including baryonic and nuclear Fermi pressure effects. Here we present the first-ever results from lattice simulations of G2 QCD with dynamical fermions, providing a first explorative look at the phase diagram of this QCD-like theory at finite temperature and baryon chemical potential.

arXiv comment5 pages, 5 figures, v2: extended discussion of vacuum physics and chiral symmetry added, some other minor improvements

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Cited by in corpus (28)

• Fluctuations in the quark-meson model for QCD with isospin chemical potential
• Towards the phase diagram of dense two-color matter
• Complex Langevin dynamics and other approaches at finite chemical potential
• Universal Aspects of QCD-like Theories
• Polyakov-Quark-Meson-Diquark Model for two-color QCD
• Chiral Mirror-Baryon-Meson Model and Nuclear Matter beyond Mean-Field
• Phase transitions and gluodynamics in 2-colour matter at high density
• Dense 2-color QCD towards continuum and chiral limits
• Finite-density gauge correlation functions in QC2D
• Exceptional thermodynamics: The equation of state of G(2) gauge theory
• Electric conductivity in finite-density SU(2) lattice gauge theory with dynamical fermions
• Continuum Goldstone spectrum of two-color QCD at finite density with staggered quarks
• Hadron masses and baryonic scales in $G_2$-QCD at finite density
• Phase structure and propagators at nonvanishing temperature for QCD and QCD-like theories
• Baryonic Matter Onset in Two-Color QCD with Heavy Quarks
• Simple QED- and QCD-like Models at Finite Density
• A Hybrid-Monte-Carlo study of monolayer graphene with partially screened Coulomb interactions at finite spin density
• On the Landau-gauge adjoint quark propagator
• Constructing a neutron star in G2-QCD
• Classification of sign-problem-free relativistic fermions on the basis of the Majorana positivity
• Center phase transition from matter propagators in (scalar) QCD
• Positivity of center subsets for QCD
• Monte Carlo Study of Strongly-Interacting Degenerate Fermions: a Model for Voltage-Biased Bilayer Graphene
• Condensation phenomena in two-flavor scalar QED at finite chemical potential
• Color screening in flux tubes and in the color Coulomb potential from the QCD Field Correlators
• The quark propagator in QCD and $G_2$ QCD
• Remarks on the Confinement in the $G(2)$ Gauge Theory Using the Thick Center Vortex Model
• Strongly Interacting Dark Matter admixed Neutron Stars