A refined holographic QCD model and QCD phase structure

Yang, Yi; Pei, Yuan

doi:10.1007/jhep11(2014)149

Cited by 54 publications

(59 citation statements)

References 52 publications

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“…In general, A(z), f (z) should be solved from certain kind of gravity system coupled with the soft-wall model action. But the full back-reaction solution is difficult to obtained, and the simple approximation 'potential reconstruction method' used in [71][72][73][74][75][76][77][78][79] can not be used here, because it can not take into account the temperature dependent of condensations. Thus, for simplicity, in the sense of probe limit, we take the following Anti-de Sitter-Reissner-Nordstrom (AdS-RN) metric solution with finite isospin number…”

Section: Soft Wall Model With Finite Isospin Chemical Potentialmentioning

confidence: 99%

Pion condensation in a soft-wall AdS/QCD model

2019

J. High Energ. Phys.

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Finite isospin chemical potential µ I and temperature T have been introduced in the framework of soft-wall AdS/QCD model. By self-consistently solve the equation of motion, we obtain the phase boundary of pion condensation phase, across which the system undergoes a phase transition between pion condensation phase and normal phase. Comparing the free energy of solutions with and without pion condensation, we find that the phase transition is of first order type both at large µ I and small µ I . Qualitatively, the behavior at large µ I is in agreement with the lattice simulation in Phys. Rev.D66(2002)034505, while the behavior at small µ I is different from lattice simulations and previous studies in hard wall AdS/QCD model. This indicates that a full back-reaction model including the interaction of gluo-dynamics and chiral dynamics might be necessary to describe the small µ I pion condensation phase. This study could provide certain clues to build a more realistic holographic model.

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Section: Soft Wall Model With Finite Isospin Chemical Potentialmentioning

confidence: 99%

Pion condensation in a soft-wall AdS/QCD model

2019

J. High Energ. Phys.

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“…Input the metric structure to solve the field(s) and the potential(s) of the field(s) [84,[92][93][94].…”

Section: Jhep06(2015)046mentioning

confidence: 99%

Temperature dependent transport coefficients in a dynamical holographic QCD model

Huang

2015

J. High Energ. Phys.

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Abstract:We investigate temperature dependent behavior of various transport coefficients in a dynamical holographical QCD model. We show the nontrivial temperature dependent behavior of the transport coefficients, like bulk viscosity, electric conductivity as well as jet quenching parameter, and it is found that all these quantities reveal information of the phase transition. Furthermore, with introducing higher derivative corrections in 5D gravity, the shear viscosity over entropy density ratio also shows a valley around phase transition, and it is found that the shear viscosity over entropy density ratio times the jet quenching over temperature cubic ratio almost remains as a constant above phase transition, and the value is two times larger than the perturbative result in Phys.Rev. Lett.99.192301(2007).

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“…By including a U (1) gauge field, one can introduce the chemical potential to the system. In the framework of EMD system, the authors of [85] proposed a holographic QCD model with a critical end point at T c = 0.121GeV, µ B c = 0.693GeV. The model is shown to produce correct vector meson spectra as well as thermodynamical data.…”

Section: Einstein-maxwell-dilaton System and Critical End Point Of Qcmentioning

confidence: 99%

“…Firstly, for the compactness of this paper, we will briefly introduce the EMD system. Following [85], the action is taken as…”

Section: Einstein-maxwell-dilaton System and Critical End Point Of Qcmentioning

confidence: 99%

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Criticality of QCD in a holographic QCD model with critical end point

Chen¹,

Li²,

Huang³

2019

Chinese Phys. C

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Thermodynamics of strongly interacting matter near critical end point are investigated in a holographic QCD model, which could describe the QCD phase diagram in T − µ plane qualitatively. Critical exponents along different axis (α, β, γ, δ) are extracted numerically. It is given that α ≈ 0, β ≈ 0.54, γ ≈ 1.04, δ ≈ 2.97, the same as 3D Ising mean-field approximation and previous holographic QCD model calculations. We also discuss the possibilities to go beyond mean field approximation by including the full back-reaction of chiral dynamics in the holographic framework.The mean field calculation show that α = 0, β =

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A refined holographic QCD model and QCD phase structure

Cited by 54 publications

References 52 publications

Pion condensation in a soft-wall AdS/QCD model

Pion condensation in a soft-wall AdS/QCD model

Temperature dependent transport coefficients in a dynamical holographic QCD model

Criticality of QCD in a holographic QCD model with critical end point

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