  We show that a generalized version of the holographic principle can be
derived from the Hamiltonian description of information flow within a quantum
system that maintains a separable state. We then show that this generalized
holographic principle entails a general principle of gauge invariance. When
this is realized in an ambient Lorentzian space-time, gauge invariance under
the Poincare group is immediately achieved. We apply this pathway to retrieve
the action of gravity. The latter is cast a la Wilczek through a similar
formulation derived by MacDowell and Mansouri, which involves the
representation theory of the Lie groups SO(3,2) and SO(4,1).
