Can I read Generating Spin Polarization from Vorticity Through Nonlocal Collisions on EtoBox?

Generating Spin Polarization from Vorticity Through Nonlocal Collisions by Weickgenannt, Nora; Speranza, Enrico; Sheng, Xin-li; Wang, Qun; Rischke, Dirk H. is a scholarly article available to read on EtoBox.

What is Generating Spin Polarization from Vorticity Through Nonlocal Collisions about?

We derive the collision term in the Boltzmann equation using the equation of motion for the Wigner function of massive spin-1/2 particles. To next-to-lowest order in $\hbar$ it contains a nonlocal contribution, which is responsible for the conversion of orbital into spin angular momentum. In a proper choice of pseudo-gauge the antisymmetric part of the energy-momentum tensor arises solely from this nonlocal contribution. We show that the collision term vanishes only in global equilibrium and that the spin potential is then equal to the thermal vorticity. In the nonrelativistic limit, the equations of motion for the energy-momentum and spin tensors reduce to the well-known form for hydrodynamics for micropolar fluids.

Author

Weickgenannt, Nora; Speranza, Enrico; Sheng, Xin-li; Wang, Qun; Rischke, Dirk H.

Published

2020

Language

EN