Negative energies and time reversal in Quantum Field Theory and General Relativity, The Dark Side of Gravity
Résumé
Rehabilitation of negative energies in Quantum Field Theory and General Relativity is undertaken. The proposed link between negative energies, time reversal and the existence of two conjugated metrics opens the way to a new natural gravitational interaction mechanism between positive and negative energy fields. The usual Schwarzschild solution in vacuum gets modified at Post-Post-Newtonian order. A flat universe accelerating expansion phase is obtained naturally without resorting to a cosmological constant. In this more favorable context, classical and quantum instability issues should be reconsidered. Related theoretical issues along with phenomenological consequences are explored.