Can we study Quark Matter in the Quenched Approximation?
arXiv:hep-lat/0703001 · doi:10.1016/j.nuclphysb.2007.07.025
Abstract
We study a quenched SU(2) lattice gauge theory in which, in an attempt to distinguish between timelike and spacelike gauge fields, the gauge ensemble {U_mu} is generated from a 3 dimensional gauge-Higgs model, the timelike link variables being "reconstructed" from the Higgs fields. The resulting ensemble is used to study quenched quark propagation with non-zero chemical potential mu; in particular, the quark density, chiral and superfluid condensates, meson, baryon and gauge-fixed quark propagators are all studied as functions of mu. While it proves possible to alter the strength of the inter-quark interaction by changing the parameters of the dimensionally reduced model, there is no evidence for any region of parameter space where quarks exhibit deconfined behaviour or thermodynamic observables scale as if there were a Fermi surface.
31 pages, 20 figures, enhanced discussion and analysis of finite volume effects, version accepted for publication by Nucl. Phys. B
References in corpus (25)
- Superconductivity by long-range color magnetic interaction in high-density quark matter
- Random matrix model of QCD at finite density and the nature of the quenched limit
- QCD-like Theories at Finite Baryon Density
- Scaling and Asymptotic Scaling in the SU(2) Gauge Theory
- 3d SU(N) + adjoint Higgs theory and finite temperature QCD
- Universal results from an alternate random matrix model for QCD with a baryon chemical potential
- Static correlation lengths in QCD at high temperatures and finite densities
- Numerical Study of Dense Adjoint Matter in Two Color QCD
- Symmetries and spectrum of SU(2) Lattice Gauge Theory at finite chemical potential
- Two-colour QCD at non-zero quark-number density
- Deconfinement in dense 2-color QCD
- Unquenched QCD Dirac Operator Spectra at Nonzero Baryon Chemical Potential
- Exact relation of lattice and continuum parameters in three-dimensional SU(2)+Higgs theories
- The spectrum of the three-dimensional adjoint Higgs model and hot SU(2) gauge theory
- Behavior of Hadrons at Finite Density -- Lattice Study of Color SU(2) QCD
- On the Phase Diagram of the SU(2) Adjoint Higgs Model in 2+1 Dimensions
- Diquark condensation in dense adjoint matter
- Analytic continuation from imaginary to real chemical potential in two-color QCD
- Behaviour of the topological susceptibility in two colour QCD across the finite density transition
- Phase-diagram of two-color lattice QCD in the chiral limit
- Real and imaginary chemical potential in 2-color QCD
- Fermion Condensates in Two Colours Finite Density QCD at Strong Coupling
- Numerical Portrait of a Relativistic BCS Gapped Superfluid
- Fermi Surface Phenomena in the (2+1)d Four-Fermi Model
- Zero Lattice Sound