skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Thermal phase transition in a QCD-like holographic model

Abstract

We investigate the high-temperature phase of a dilaton flow deformation of the anti-de Sitter/conformal field theory correspondence. We argue that these geometries should be interpreted as the N=4 gauge theory perturbed by a SO(6) invariant scalar mass and that the high-temperature phase is just the well-known anti-de Sitter-Schwarzschild solution. We compute, within supergravity, the resulting Hawking-Page phase transition, which in this model can be interpreted as a deconfining transition in which the vacuum expectation value for the operator TrF{sup 2} dissolves. In the presence of quarks the model also displays a simultaneous chiral symmetry restoring transition with the Goldstone mode and other quark bound states dissolving into the thermal bath.

Authors:
;  [1]
  1. School of Physics and Astronomy, University of Southampton, Southampton, SO17 1BJ (United Kingdom)
Publication Date:
OSTI Identifier:
21250951
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physical Review. D, Particles Fields; Journal Volume: 78; Journal Issue: 10; Other Information: DOI: 10.1103/PhysRevD.78.105020; (c) 2008 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; BOUND STATE; CHIRAL SYMMETRY; CONFORMAL INVARIANCE; DE SITTER GROUP; DEFORMATION; EXPECTATION VALUE; GAUGE INVARIANCE; HOLOGRAPHY; MASS; PHASE TRANSFORMATIONS; QUANTUM CHROMODYNAMICS; QUANTUM FIELD THEORY; QUARK MODEL; QUARKS; SCHWARZSCHILD METRIC; SIMULATION; SO-6 GROUPS; STRING MODELS; SUPERGRAVITY

Citation Formats

Evans, Nick, and Threlfall, Ed. Thermal phase transition in a QCD-like holographic model. United States: N. p., 2008. Web. doi:10.1103/PHYSREVD.78.105020.
Evans, Nick, & Threlfall, Ed. Thermal phase transition in a QCD-like holographic model. United States. doi:10.1103/PHYSREVD.78.105020.
Evans, Nick, and Threlfall, Ed. 2008. "Thermal phase transition in a QCD-like holographic model". United States. doi:10.1103/PHYSREVD.78.105020.
@article{osti_21250951,
title = {Thermal phase transition in a QCD-like holographic model},
author = {Evans, Nick and Threlfall, Ed},
abstractNote = {We investigate the high-temperature phase of a dilaton flow deformation of the anti-de Sitter/conformal field theory correspondence. We argue that these geometries should be interpreted as the N=4 gauge theory perturbed by a SO(6) invariant scalar mass and that the high-temperature phase is just the well-known anti-de Sitter-Schwarzschild solution. We compute, within supergravity, the resulting Hawking-Page phase transition, which in this model can be interpreted as a deconfining transition in which the vacuum expectation value for the operator TrF{sup 2} dissolves. In the presence of quarks the model also displays a simultaneous chiral symmetry restoring transition with the Goldstone mode and other quark bound states dissolving into the thermal bath.},
doi = {10.1103/PHYSREVD.78.105020},
journal = {Physical Review. D, Particles Fields},
number = 10,
volume = 78,
place = {United States},
year = 2008,
month =
}
  • We consider a holographic model constructed from the intersecting brane configuration D4-D4/D4 in noncritical string theory. We study the chiral phase diagram of this holographic QCD-like model with a finite baryon chemical potential through the supergravity dual approximation.
  • In the framework of a holographic QCD approach we study the influence of matter on the deconfinement temperature T{sub c}. We first consider the quark flavor number (N{sub f}) dependence of T{sub c}. We observe that T{sub c} decreases with N{sub f}, which is consistent with a lattice QCD result. We also delve into how the quark number density {rho}{sub q} affects the value of T{sub c}. We find that T{sub c} drops with increasing {rho}{sub q}. In both cases, we confirm that the contributions from quarks are suppressed by 1/N{sub c}, as it should be, compared to the onesmore » from a gravitational action (pure Yang-Mills theory)« less
  • We study four-dimensional interacting fermions in a strong magnetic field, using the holographic Sakai-Sugimoto model of intersecting D4- and D8-branes in the deconfined, chiral-symmetric parallel phase. We find that as the magnetic field is varied, while staying in the parallel phase, the fermions exhibit a first-order phase transition in which their magnetization jumps discontinuously. Properties of this transition are consistent with a picture in which some of the fermions jump to the lowest Landau level. Similarities to known magnetic phase transitions are discussed.