Speaker
Description
We derive a quantum kinetic theory for QED based on Kadanoff-Baym equation [1]. It generalizes the well-known classical kinetic theory to the polarized case, with spin polarization entering in the next order of gradient expansion. We also discuss generalization to QCD. We use this framework to study polarization of probe massive fermion in QED plasma with shear [2]. We find new collisional contributions to shear induced polarization coming from self-energy and gauge link respectively. The new contributions are parametrically the same as the one considered so far in the literature. They can lead to modest suppression of the shear induced polarization in phenomenological studies.
[1] Shu Lin, "Quantum kinetic theory for quantum electrodynamics", Physical Review D 105 (2022) 7, 076017
[2] Shu Lin and Ziyue Wang, "Shear induced polarization: Collisional contributions", arXiv:2206.12573
