Meson potential energy in a non-conformal holographic model

Asadi, Mohsen; Hajilou, Ali

doi:10.1016/j.nuclphysb.2022.115744

Nuclear Physics B

2022

DOI: 10.1016/j.nuclphysb.2022.115744

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Meson potential energy in a non-conformal holographic model

Mohsen Asadi

Ali Hajilou

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Cited by 3 publications

References 40 publications

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Running coupling for holographic QCD with heavy and light quarks: Isotropic case

Aref’eva,

Hajilou,

Slepov

et al. 2024

Phys. Rev. D

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We consider the running coupling constant in holographic models supported by Einstein-dilaton-Maxwell action for heavy and light quarks. To obtain the dependence of the running coupling constant α on temperature and chemical potential we impose boundary conditions on the dilaton field that depend on the position of the horizon. We use two types of boundary conditions: a simple boundary condition with the dilaton field vanishing at the horizon and a boundary condition that ensures an agreement with lattice calculations of string tension between quarks at zero chemical potential. The location of the first order phase transitions in the (μ,T) plane does not depend on the dilaton boundary conditions for light and heavy quarks. At these phase transitions, the function α undergoes jumps depending on temperature and chemical potential. We also show that for the second boundary conditions the running coupling decreases with a temperature increase, and the dependence on temperature and chemical potential both for light and heavy quarks is actually specified in quark-gluon plasma (QGP) phase by functions of one variable, demonstrating in this sense automodel behavior. Published by the American Physical Society 2024

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Running coupling for holographic QCD with heavy and light quarks: Isotropic case

Aref’eva,

Hajilou,

Slepov

et al. 2024

Phys. Rev. D

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Probing phase structure of strongly coupled matter with holographic entanglement measures

2023

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We study the holographic entanglement measures such as the holographic mutual information, HMI, and the holographic entanglement of purification, EoP, in a holographic QCD model at finite temperature and zero chemical potential. This model can realize various types of phase transitions including crossover, first order and second order phase transitions. We use the HMI and EoP to probe the phase structure of this model and we find that at the critical temperature they can characterize the phase structure of the model. Moreover we obtain the critical exponent using the HMI and EoP.

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Meson excitation time as a probe of holographic critical point

Hajilou

2023

Eur. Phys. J. C

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We study the time evolution of expectation value of Wilson loop as a non-local observable in a strongly coupled field theory with a critical point at finite temperature and nonzero chemical potential, which is dual to an asymptotically AdS charged black hole via gauge/gravity duality. Due to inject of energy into the plasma, the temperature and a chemical potential increase to finite values and the plasma experiences an out-of-equilibrium process. By defining meson excitation time $$t_{ex}$$ t ex as a time at which the meson falls into the final excited state, we investigate the behavior of $$t_{ex}$$ t ex near the critical point as the system evolves towards the critical point. We observe that by increasing the interquark distance the dynamical critical exponent increases smoothly. Also, we obtain for slow quenches different values of the dynamical critical exponent, although for fast quenches our result for the dynamical critical exponent is in agreement with the one that is reported for studying the quasi-normal modes. Consequently, this indicates that in this model for fast quenches and small values of interquark distances the gauge invariant Wilson loop is a good non-local observable to probe the critical point.

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Meson potential energy in a non-conformal holographic model

Cited by 3 publications

References 40 publications

Running coupling for holographic QCD with heavy and light quarks: Isotropic case

Running coupling for holographic QCD with heavy and light quarks: Isotropic case

Probing phase structure of strongly coupled matter with holographic entanglement measures

Meson excitation time as a probe of holographic critical point

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