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Chinese Physics C > 2022, Vol. 46 > Issue(7): 073101 DOI: 10.1088/1674-1137/ac5c2d

Running coupling constant at finite chemical potential and magnetic field from holography

  • 1.

    School of Nuclear Science and Technology, University of South China, Hengyang 421001, China

  • 2.

    School of Nuclear Science and Technology, University of Chinese Academy of Sciences, Beijing 100049, China

  • 3.

    Central China Normal University, Wuhan 430079, China

  • According to gauge/gravity duality, we use an Einstein-Maxwell-dilaton (EMD) model to study the running coupling constant at finite chemical potential and magnetic field. First, we calculate the effect of temperature on the running coupling constant and find the results are qualitatively consistent with lattice guage theory. Subsequently, we calculate the effect of chemical potential and magnetic field on running coupling. It is found that the chemical potential and magnetic field both suppress the running coupling constant. However, the effect of the magnetic field is slightly larger than that of chemical potential for a fixed temperature. Compared with the confinement phase, the magnetic field has a large influence on the running coupling in the deconfinement phase.
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  • References

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