We construct an improved soft-wall AdS/QCD model with a cubic coupling term of the dilaton and the bulk scalar field. The background fields in this model are solved by the Einstein-dilaton system with a nontrivial dilaton potential, which has been shown to reproduce the equation of state from the lattice QCD with two flavors. The chiral transition behaviors are investigated in the improved soft-wall AdS/QCD model with the solved gravitational background, and the crossover transition can be realized. Our study provides the possibility to address the deconfining and chiral phase transitions simultaneously in the bottom-up holographic framework.

中文翻译：

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具有更真实引力背景的软壁 AdS/QCD 状态方程和手性跃迁

我们构建了一个改进的软壁 AdS/QCD 模型，其中包含膨胀子和体标量场的三次耦合项。该模型中的背景场由具有非平凡扩张势的爱因斯坦-扩张系统求解，该系统已被证明可以从具有两种风格的晶格 QCD 中重现状态方程。在求解重力背景的改进软壁 AdS/QCD 模型中研究了手征跃迁行为，可以实现交叉跃迁。我们的研究提供了在自下而上的全息框架中同时解决去限制和手性相变的可能性。