Institute for Theoretical Physics and Center for Extreme Matter and Emergent Phenomena, Utrecht University, Leuvenlaan 4, 3584 CE Utrecht, Netherlands.
Institut de Physique Théorique Philippe Meyer and Laboratoire de Physique Théorique, École Normale Supérieure, PSL Research University, CNRS, 24 rue Lhomond, 75231 Paris Cedex 05, France.
Phys Rev Lett. 2018 Jun 15;120(24):242002. doi: 10.1103/PhysRevLett.120.242002.
We investigate QCD-like gauge theories at strong coupling at a finite magnetic field B, temperature T, and quark chemical potential μ using the improved holographic QCD model, including the full backreaction of the quarks in the plasma. In addition to the phase diagram, we study the behavior of the quark condensate as a function of T, B, and μ and discuss the fate of (inverse) magnetic catalysis at a finite μ. In particular, we observe that inverse magnetic catalysis exists only for small values of the chemical potential. The speed of sound in this holographic quark-gluon plasma exhibits interesting dependence on the thermodynamic parameters.
我们使用改进的全息 QCD 模型研究了强磁场 B、温度 T 和夸克化学势 μ 下的 QCD 样规范理论，包括等离子体中夸克的完全后效。除了相图，我们还研究了夸克凝聚物作为 T、B 和 μ 的函数的行为，并讨论了有限 μ 下（逆）磁催化的命运。特别是，我们观察到逆磁催化仅在化学势较小时存在。这个全息夸克-胶子等离子体中的声速表现出对热力学参数的有趣依赖关系。
