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The entanglement properties of holographic QCD model with a critical end point

Chinese Physics C 2021年第1期45卷 175-186页

作者： Zhibin Li Kun Xu Mei Huang School of Physics Zhengzhou UniversityNo.100 Science AvenueZhengzhou 450001China School of Nuclear Science and Technology University of Chinese Academy of SciencesBeijing 100049China Institute of High Energy Physics Chinese Academy of SciencesBeijing 100049China

We investigated different entanglement properties of a holographic QCD(hQCD)model with a critical end point at the finite baryon ***,we considered the holographic entanglement entropy(HEE)of this hQCD model in a spherical shaped region and a strip shaped *** was determined that the HEE of this hQCD model in both regions can reflect QCD phase ***,although the area formulas and minimal area equations of the two regions were quite different,the HEE exhibited a similar behavior on the QCD phase ***,we assert that the behavior of the HEE on the QCD phase diagram is independent of the shape of the ***,the HEE is not an ideal parameter for the characterization of the entanglement between different subregions of a thermal *** such,we investigated the mutual information(MI),conditional mutual information(CMI),and the entanglement of purification(Ep)in different strip shaped *** determined that the three entanglement quantities exhibited some universal behavior;their values did not change significantly in the hadronic matter phase but increased rapidly with the increase in T andμin the QGP *** the phase boundary,these three entanglement quantities changed smoothly in the crossover region and continuously but not smoothly at CEP;they exhibited discontinuous behavior in the first phase transition *** properties can be used to distinguish between the different phases of strongly coupled matter.

关键词： holographic QCD critical end point entanglement properties

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Chiral phase transition and equation of state in chiral imbalance

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Chinese Physics C 2021年第8期45卷 145-152页

作者： Qing-Wu Wang Chao Shi Hong-Shi Zong College of Physics Sichuan UniversityChengdu 610064China Department of nuclear science and technology Nanjing University of Aeronautics and AstronauticsNanjing 210016China Department of Physics Nanjing UniversityNanjing 210093China Department of Physics Anhui Normal UniversityWuhuAnhui 241000China Nanjing Institute of Proton Source Technology Nanjing 210046China

The chiral phase transition and equation of state are studied within a novel self-consistent mean-field approximation of the two-flavor Nambu-Jona-Lasinio *** this newly developed model,modifications to the chemical μand chiral chemical μ5 potentials are naturally included by introducing vector and axial-vector channels from Fierz-transformed Lagrangian to the standard *** the proper-time scheme,the chiral phase transition is a crossover in the T-μ ***,when μ5 is incorporated,our study demonstrates that a first order phase transition may ***,the chiral imbalance will soften the equation of state of quark *** mass-radius relationship and tidal deformability of quark stars are *** maximum mass and radius decrease as μ5 *** study also indicates that the vector and axial-vector channels exhibit an opposite influence on the equation of state.

关键词： chiral imbalance critical end point tidal deformability

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Characterizing variable for the critical point in momentum space

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Chinese Physics C 2009年第8期33卷 655-660页

作者：杜佳欣柯宏伟许明梅刘连寿 Institute of Particle Physics Huazhong Normal University Key Laboratory of Quark & Lepton Physics (Huazhong Normal University) Ministry of Education

The possible experimentally observable signal in momentum space for the critical point, which is free from the contamination of statistical fluctuations, is discussed. It is shown that the higher order scaled moment of transverse momentum can serve as an appropriate signal for the critical point, provided the transverse momentum distribution has a sudden change when energy increases passing through this point. A 2-D percolation model with a linear temperature gradient is constructed to check this suggestion. A sudden change of third order scaled moment of transverse momentum is observed.

关键词： relative heavy ion collision phase transition critical end point transverse momentum scaled moments

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