  We study the important, yet widely overlooked, role of gluons for spin
transport with a connection to local parity violation in quark gluon plasmas.
We extend the newly developed quantum kinetic theory for relativistic fermions
to the case coupled with non-Abelian chromo-electromagnetic fields and employ
this formalism to investigate the spin polarization of quarks under dynamically
generated color fields in near-equilibrium quark gluon plasmas. It is found
that the spin polarization could be induced by parity-odd correlators of color
fields, which may dominate over collisional effects at weak coupling. Our
result provides with a possible explanation for the spin alignment of vector
mesons measured in high-energy nuclear collisions and alludes to the connection
with local parity violation.
