MG11 
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Gauge Gravity and Real Quantum Mechanics

Reformulation of the Dirac equation in terms of the real Spacetime Algebra (STA) reveals hidden geometric structure, including a geometric role of the unit imaginary as generator of rotations in the spacelike plane of electron spin. The STA and the real Dirac equation play essential roles in a new Gauge Theory Gravity (GTG) version of General Relativity (GR). Besides clarifying the conceptual foundations of GR and facilitating complex computations, GTG opens up new possibilities for a unified gauge theory of gravity and quantum mechanics, including spacetime geometry of electroweak interactions. Geometric Calculus website: http://modelingnts.la.asu.edu/