Holographic collisions in large D effective theory

We study collisions of Gaussian mass-density blobs in a holographic plasma, using a large D effective theory, as a model for holographic shockwave collisions. The simplicity of the effective theory allows us to perform the first 4+1 collisions in Einstein-Maxwell theory, which are dual to collisions of matter with non-zero baryonic number. We explore several collision scenarios with different blob shapes, impact parameters and charge values and find that collisions with impact parameter below the transverse width of the blobs are equivalent under rescaling. We also observe that charge weakly affects the rest of quantities. Finally, we study the entropy generated during collisions, both by charge diffusion and viscous dissipation. Multiple stages of linear entropy growth are identified, whose rates are not independent of the initial conditions.

Automated summary

In this study, collisions of Gaussian mass-density blobs in a holographic plasma are investigated using a large D effective theory as a model for holographic shockwave collisions. The first 4+1 collisions in Einstein-Maxwell theory, which correspond to collisions of matter with non-zero baryonic number, are successfully simulated using the simplicity of the effective theory. Several collision scenarios with different blob shapes, impact parameters, and charge values are explored, revealing that collisions with impact parameter below the transverse width of the blobs are equivalent under rescaling. The weak effect of charge on other quantities is also observed. The generation of entropy during collisions is studied, considering both charge diffusion and viscous dissipation, and multiple stages of linear entropy growth are identified, with rates dependent on the initial conditions.