A continuous one-parameter family of holographic geometries interpolates between confining and deconfined phases, with string tension and chiral condensate vanishing smoothly at the black hole endpoint.
Chiral Symmetry Breaking and Pions in Non-Supersymmetric Gauge/Gravity Duals
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abstract
We study gravity duals of large N non-supersymmetric gauge theories with matter in the fundamental representation by introducing a D7-brane probe into deformed AdS backgrounds. In particular, we consider a D7-brane probe in both the AdS Schwarzschild black hole solution and in the background found by Constable and Myers, which involves a non-constant dilaton and S^5 radius. Both these backgrounds exhibit confinement of fundamental matter and a discrete glueball and meson spectrum. We numerically compute the quark condensate and meson spectrum associated with these backgrounds. In the AdS-black hole background, a quark-bilinear condensate develops only at non-zero quark mass. We speculate on the existence of a third order phase transition at a critical quark mass where the D7 embedding undergoes a geometric transition. In the Constable-Myers background, we find a chiral symmetry breaking condensate as well as the associated Goldstone boson in the limit of small quark mass. The existence of the condensate ensures that the D7-brane never reaches the naked singularity at the origin of the deformed AdS space.
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Holographic model of massive deconfined quarks yields a stiff enough equation of state to allow stable 2-solar-mass hybrid stars with quark cores for certain nuclear phases.
Density-of-states lattice study of the first-order phase transition in Sp(4) Yang-Mills theory at finite temperature, confirming metastability and surface tension for two temporal extents toward the continuum limit.
Near the insulating-CME phase boundary in the D3/D7 model, the chiral magnetic current shows multi-valued dependence on magnetic field strength, while axial chemical potential and magnetic field cooperatively stabilize the insulating phase.
citing papers explorer
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Confinement and chiral symmetry breaking in holography: a smooth switch-off
A continuous one-parameter family of holographic geometries interpolates between confining and deconfined phases, with string tension and chiral condensate vanishing smoothly at the black hole endpoint.
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Properties of Stable Massive Quark Stars in Holography
Holographic model of massive deconfined quarks yields a stiff enough equation of state to allow stable 2-solar-mass hybrid stars with quark cores for certain nuclear phases.
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Finite-temperature Yang-Mills theories with the density of states method: towards the continuum limit
Density-of-states lattice study of the first-order phase transition in Sp(4) Yang-Mills theory at finite temperature, confirming metastability and surface tension for two temporal extents toward the continuum limit.
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Nonlinear response of the chiral magnetic effect in the D3/D7 holographic model
Near the insulating-CME phase boundary in the D3/D7 model, the chiral magnetic current shows multi-valued dependence on magnetic field strength, while axial chemical potential and magnetic field cooperatively stabilize the insulating phase.