paper

The Quaternionic Dirac Lagrangian

arXiv:hep-th/9509059 · doi:10.1142/S0217732396000400

Abstract

We discuss the use of the variational principle within quaternionic quantum mechanics. This is non-trivial because of the non commutative nature of quaternions. We derive the Dirac Lagrangian density corresponding to the two-component Dirac equation. This Lagrangian is complex projected as anticipated in previous articles and this feature is necessary even for a classical real Lagrangian.

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