18 research outputs found
Negative energies and time reversal in Quantum Field Theory
The theoretical and phenomenological status of negative energies is reviewed
in Quantum Field theory leading to the conclusion that hopefully their
rehabilitation might only be completed in a modified general relativistic modelComment: 21/04/200
The Dark Side of Gravity
Adopting a non geometrical point of view, we are led to an alternative theory
of the order two and symetric gravitational tensor field of GR. The field is no
more interpreted as the metric of our space-time. The true metric is globally
Minkowskian and describes a flat manifold, a context which justifies a genuine
rehabilitation of the global discrete space-time symetries involved in the
structure of the Lorentz group along with their 'problematic' representations:
the negative energy and tachyonic ones
I - Matter, antimatter and geometry II - The twin universe model : a solution to the problem of negative energy particles III - The twin universe model plus electric charges and matter-antimatter symmetry
We introduce a new dynamical group whose coadjoint action on its momentum
space takes account of matter-antimatter symmetry on pure geometrical grounds.
According to this description the energy and the spin are unchanged under
matter-antimatter symmetry. We recall that the antichron components of the
Poincar\'{e} group, ruling relativistic motions of a mass-point particle,
generate negative energy particles. The model with two twin universes, inspired
by Sakharov's one, solves the stability issue. Positive and negative energy
particles motions hold in two distinct folds. The model is extended to charged
particles. As a result, the matter-antimatter duality holds in both universes.Comment: 19 Fevrier 200
Negative Energies and a Constantly Accelerating Flat Universe
It has been shown that in the context of General Relativity (GR) enriched
with a new set of discrete symmetry reversal conjugate metrics, negative energy
states can be rehabilitated while avoiding the well-known instability issues.
We review here some cosmological implications of the model and confront them
with the supernovae and CMB data. The predicted flat universe constantly
accelerated expansion phase is found to be in rather good agreement with the
most recent cosmological data
Experimental tests of CPT symmetry and quantum mechanics at CPLEAR
We review a phenomenological parametrization of an open quantum-mechanical formalism for CPT violation in the neutral kaon system, and constrain the parameters using fits to recent CPLEAR data.We review a phenomenological parametrization of an open quantum-mechanical formalism for CPT violation in the neutral kaon system, and constrain the parameters using fits to recent CPLEAR data
Experimental tests of CPT symmetry and quantum mechanics at CPLEAR
We review a phenomenological parametrization of an open quantum-mechanical formalism for CPT violation in the neutral kaon system, and constrain the parameters using fits to recent CPLEAR data
Dark Gravity confronted to SN, BAO and the CMB
International audienceAfter a brief reminder of the Dark Gravity theory foundations the confrontationto the main cosmological probes is carried out. A complete, regularly updated,review of the theory and full references can be found in [1]