Spin hydrodynamics and symmetric energy-momentum tensors – A current induced by the spin vorticity –

By Kenji Fukushima, Shi Pu. 2020

135 citations recorded by the source corpus.

We discuss a puzzle in relativistic spin hydrodynamics; in the previous formulation the spin source from the antisymmetric part of the canonical energy-momentum tensor (EMT) is crucial. The Belinfante improved EMT is pseudo-gauge transformed from the canonical EMT and is usually a physically sensible choice especially when gauge fields are coupled as in magnetohydrodynamics, but the Belinfante EMT has no antisymmetric part. We find that pseudo-transformed entropy currents are physically inequivalent in nonequilibrium situations. We also identify a current induced by the spin vorticity read from the Belinfante symmetric EMT.

Subfields: Nuclear and High Energy Physics

View Paper: https://www.semanticscholar.org/paper/9db81dfafc10afb0c150e13b0a0d3478e3c32ac4