Quantum corrections to screening at strong coupling

Bulk viscous corrections to screening and damping in QCD at high temperatures

Non-equilibrium corrections to the distribution functions of quarks and gluons in a hot and dense QCD medium modify the "hard thermal loops" (HTL). The HTLs determine the retarded, advanced, and symmetric (time-ordered) propagators for gluons with soft momenta as well as the Debye screening and Landau damping mass scales. We compute such corrections to a thermal as well as to a non-thermal fixed point.The screening and damping mass scales are sensitive to the bulk pressure and hence to (pseudo-) critical dynamical scaling of the bulk viscosity in the vicinity of a second-order critical point. …

Robustness of kinetic screening against matter coupling

We investigate neutron star solutions in scalar-tensor theories of gravity with first-order derivative self-interactions in the action and in the matter coupling. We assess the robustness of the kinetic screening mechanism present in these theories against general conformal couplings to matter. The latter include ones leading to the classical Damour-Esposito-Farèse scalarization, as well as ones depending on the kinetic term of the scalar field. We find that kinetic screening always prevails over scalarization, and that kinetic couplings with matter enhance the suppression of scalar gradients …

Screening Modifications of Gravity through Disformally Coupled Fields

It is shown that extensions to General Relativity, which introduce a strongly coupled scalar field, can be viable if the interaction has a non-conformal form. Such disformal coupling depends upon the gradients of the scalar field. Thus, if the field is locally static and smooth, the coupling becomes invisible in the solar system: this is the disformal screening mechanism. A cosmological model is considered where the disformal coupling triggers the onset of accelerated expansion after a scaling matter era, giving a good fit to a wide range of observational data. Moreover, the interaction leaves…

相对论等离子体在磁场中的异常动力学屏蔽

Anomalous Dynamical Screening of Relativistic Plasma in a Magnetic Field

研究相对论非碰撞等离子体中集体激发，考虑动态电磁学和手性电荷波动，发现手性异常对横向光子自能的修正及新型动态屏蔽，强磁场下集体模出现能隙，探讨其对中子星现象的影响。

The Debye Length and the Running Coupling of QCD: a Potential and Phenomenological Approach

In this paper, one uses a damped potential to present a description of the running coupling constant of QCD in the confinement phase. Based on a phenomenological perspective for the Debye screening length, one compares the running coupling obtained here with both the Brodsky-de Téramond-Deur and the Richardson approaches. The results seem to indicate the model introduced here corroborate the Richardson approach. Moreover, the Debye screening mass in the confinement phase depends on a small parameter, which tends to vanish in the non-confinement phase of QCD.

关于Liouville耦合常数

On the Liouville coupling constants

对于Cremmer Roussel Schnittger和本文作者用（正整数）屏蔽数推导出的一般算子积代数系数，耦合常数决定了除量子群6 j符号之外的因子。它们由零模空间中二维晶格上的路径无关乘积给出。结果表明，Dorn-Otto和Zamolodchikov-Zamolodchikov的三点函数的解析式精确地定义了相应的平格连接，从而将这些耦合常数自然地推广到连续屏蔽数.审查的一致性的限制整数屏蔽费用，并显示与（广义）6 j符号的正交性。因此，扩展最后一个关系是一般筛选数的关键。