Abstract
An overview of the electromagnetic physics (EM) models available in the Geant4 toolkit is presented. Recent improvements are focused on the performance of detector simulation results from large MC production exercises at the LHC. Significant efforts were spent for high statistics validation of EM physics. The work on consolidation of Geant4 EM physics was achieved providing common interfaces for EM standard (HEP oriented) and EM low-energy models (other application domains). It allows the combination of ultra-relativistic, relativistic and low-energy models for any Geant4 EM processes. With such a combination both precision and CPU performance are achieved for the simulation of EM interactions in a wide energy range. Due to this migration of EM low-energy models to the common interface additional capabilities become available. Selected validation results are presented in this contribution.