Mathematics – Mathematical Physics
Scientific paper
Mar 1992
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992jmp....33.1073s&link_type=abstract
Journal of Mathematical Physics, Vol. 33, No. 3, p. 1073 - 1081
Mathematics
Mathematical Physics
6
Scientific paper
The electromagnetic field is minimally coupled to gravity in a Riemann-Cartan space-time containing a charged magnetized spinning fluid. It is required that the overall Lagrangian of the gravitational field, spinning matter, and the electromagnetic field be invariant under a gauge transformation of the vector potential. The theory preserves both charge conservation and particle number conservation. The electromagnetic field, via the vector potential, now interacts directly with the spin energy momentum. The spin transport equation, in addition to the usual Fermi-Walker transport term, contains a contribution due to the torque of the electromagnetic field acting on a magnetic dipole. In the absence of electromagnetism, the field equations reduce to those of the usual self-consistent Lagrangian formalism for a perfect fluid with spin density.
Krisch Jean P.
Smalley Larry L.
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