41 citations · 135 across the 8 of their papers we have counts for
Showing hep-thShow all
3 papers · 1 filter
hep-th2001★ 5 cited
The Gordon decompositions of the inertial currents of the Dirac electron correspond to a Foldy-Wouthuysen transformation
Ingo Kirsch, Lewis H. Ryder, Friedrich W. Hehl
We consider Dirac's free electron theory on the first quantized level. We decompose its canonical spin current á la Gordon and find a conserved ``Gordon spin'' current which turns…
hep-th1998★ 35 cited
On the interaction of massive spinor particles with external electromagnetic and torsion fields
Lewis H. Ryder, Ilya L. Shapiro
We explore the Dirac equation in external electromagnetic and torsion fields. Motivated by the previous study of quantum field theory in an external torsion field, we include a non…
hep-th1994★ 17 cited
Time-Independent Solutions to the Two-Dimensional Non-Linear O(3) Sigma Model and Surfaces of Constant Mean Curvature
M. S. Ody, L. H. Ryder
It is shown that time-independent solutions to the (2+1)-dimensional non- linear O(3) sigma model may be placed in correspondence with surfaces of constant mean curvature in three-…