Canonical Relativistic Quantum Mechanics

Born proposed a unification of special relativity and quantum mechanics that placed position, time, energy and momentum on equal footing through a reciprocity principle and extended the usual position-time and energy-momentum line elements to this space by combining them through a new fundamental constant. Requiring also invariance of the symplectic metric yields as the invariance group, the inhomogeneous counterpart of which is the canonically relativistic group where is the Heisenberg Group in 4 dimensions. This is the counterpart in this theory of the Poincaré group and reduces in the appropriate limit to the expected special relativity and classical Hamiltonian mechanics transformation equations. This group has the Poincaré group as a subgroup and is intrinsically quantum with the Position, Time, Energy and Momentum operators satisfying the Heisenberg algebra. The representations of the algebra are studied and Casimir invariants are computed. Like the Poincaré group, it has a little group for a (“massive”) rest frame and a null frame. The former is which clearly contains and the latter is which contains .