Fermions in gravity with local spin-base invariance

Understand

We study a formulation of Dirac fermions in curved spacetime that respects general coordinate invariance as well as invariance under local spin-base transformations.

• The natural variables for this formulation are spacetime-dependent Dirac matrices subject to the Clifford-algebra constraint.
• In particular, a coframe, i.e.
• vierbein field is not required.