Subregion complexity and confinement-deconfinement transition in a holographic QCD model

Understand

We study the subregion complexity in a semi-analytical holographic QCD model.

• Two cases with different warped factor are considered and both can realize confinement-deconfinement transition.
• By studying the behavior of the renormalized holographic complexity density $\hat{\cal C}$ versus the subregion length scale $\ell$, we find that for both cases, $\hat{\cal C}$ always experiences a discontinuity at certain critical value $\ell_c$ in confinement phases, while it is always continuous in deconfinement phases.
• This property may be seen as a signal to characterize confinement or deconfinement phases.