Holographic entanglement entropy close to crossover/phase transition in strongly coupled systems

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Abstract

We investigate the behavior of entanglement entropy in the holographic QCD model proposed by Gubser et al. By choosing suitable parameters of the scalar self-interaction potential, this model can exhibit various types of phase structures: crossover, first order and second order phase transitions. We use entanglement entropy to probe the crossover/phase transition, and find that it drops quickly/suddenly when the temperature approaches the critical point which can be seen as a signal of confinement. Moreover, the critical behavior of the entanglement entropy suggests that we may use it to characterize the corresponding phase structures.

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Zhang, S. J. (2017). Holographic entanglement entropy close to crossover/phase transition in strongly coupled systems. Nuclear Physics B, 916, 304–319. https://doi.org/10.1016/j.nuclphysb.2017.01.010

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