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gr-qc2022★ 5 cited
Second order symmetry operators for the massive Dirac equation
Simon Jacobsson, Thomas Bäckdahl
Employing the covariant language of two-spinors, we find what conditions a curved Lorentzian spacetime must satisfy for existence of a second order symmetry operator for the massiv…
gr-qc2022★ 3 cited
A space-time calculus based on symmetric 2-spinors
Steffen Aksteiner, Thomas Bäckdahl
In this paper we present a space-time calculus for symmetric spinors, including a product with a number of index contractions followed by symmetrization. As all operations stay wit…