https://doi.org/10.1140/epjc/s10052-008-0693-4
Regular Article - Theoretical Physics
Torsion-induced spin precession
Physics Department, Payame Noor University, 19395-4697, Tehran, Iran
* e-mail: m-mohseni@pnu.ac.ir
Received:
1
July
2008
Revised:
22
July
2008
Published online:
22
August
2008
We investigate the motion of a spinning test particle in a spatially-flat FRW-type space-time in the framework of the Einstein–Cartan theory. The space-time has a torsion arising from a spinning fluid filling the space-time. We show that, for spinning particles with non-zero transverse spin components, the torsion induces a precession of the particle spin around the direction of the spin of the fluid. We also show that a charged spinning particle moving in a torsion-less spatially-flat FRW space-time in the presence of a uniform magnetic field undergoes a precession of a different character.
PACS: 04.40.Nr – / 04.90.+e –
© Springer-Verlag , 2008