Dual Spacetime Symmetry Breaking down to Einstein Gravity

Einstein action of gravity is obtained from a gauge theory, if our spacetime was once in two folds with a double Lorentz symmetry. After the dual symmetry breaks spontaneously, Lorentz symmetry absorbs gauge symmetry, while the gauge field begins to drive the vierbein and the spin connection. This gauge model of gravity has many bosons and fermions with negative norms, which will be undetectable. The consistency of these particles with the Copenhagen interpretation of wave functions, and their relation to the presence of dark matter as well as the absence of antimatter in the universe are discussed.