  Strong-field quantum electrodynamics (SF-QED) plays a crucial role in
ultraintense laser matter interactions, and demands sophisticated techniques to
understand the related physics with new degrees of freedom, including spin
angular momentum. To investigate the impact of SF-QED processes, we have
introduced spin/polarization-resolved nonlinear Compton scattering, nonlinear
Breit-Wheeler and vacuum birefringence processes into our particle-in-cell
(PIC) code. In this article, we will provide details of the implementation of
these SF-QED modules and share known results that demonstrate exact agreement
with existing single particle codes. By coupling normal PIC with
spin/polarization-resolved SF-QED processes, we create a new theoretical
platform to study strong field physics in currently running or planned petawatt
or multi-petawatt laser facilities.
