Speaker
Description
We present BHAC-QGP, a numerical framework for simulating the evolution of quark-gluon plasma (QGP) in relativistic heavy-ion collisions under strong magnetic fields. Based on the general-relativistic magnetohydrodynamics code BHAC, originally developed for astrophysical applications, BHAC-QGP incorporates finite electrical conductivity and uses Adaptive Mesh Refinement (AMR) to capture QGP dynamics across multiple scales with high precision. Simulations of Au+Au collisions at RHIC energies demonstrate excellent agreement with established results and improved resolution of electromagnetic effects. Furthermore, we show that causality and a consistent treatment of Ohm’s law are essential for modeling early-time electromagnetic fields in such collisions. In particular, finite electrical conductivity plays a critical role in describing the directed flow recently measured by the STAR experiment. These features make BHAC-QGP a valuable tool for studying magneto-hydrodynamic effects in heavy-ion collisions.
