Related Experimental Research
The AEGIS project is aimed at establishing the coupling of antimatter with the gravitational field of the earth. For that matter, a beam of antihydrogen will be used.
The GBAR project aims to test the equivalence principle, which equates gravitational mass and inertial mass, by measuring the gravitational acceleration of ultracold antihydrogen obtained from deionizing H+.
The ALPHA project aims to probe antimatter gravity, by observing whether trapped antihydrogen falls up or down when it is released.
A project has been proposed to determine the gravitational properties of antimatter by experiments with muonium at the LTP.
There are plans for a new facility (FLAIR), where the gravitation of antimatter is to be established by measuring the free fall of trapped and laser-cooled antihydrogen.
Related Theoretical Research
The Italian scientist Massimo Villata has derived an equation that gives a classical description of a matter-antimatter gravitational repulsion. This theory can be used as a starting point in astronomy to explain large scale structures of the universe with gravitational repulsion.
The physicist Dragan Hajdukovic from CERN postulates that the vacuum is a stream of virtual particle/antiparticle-pairs popping in and out of existence. Assuming like inertial mass but opposite gravitational mass for matter and antimatter, Hajdukovic intends to apply his theory to solve the dark energy problem.
The French physicists Alain Benoit-Levy and Gabriel Chardin study the cosmology of a universe, called: the Dirac-Milne universe, in which matter and antimatter are equally abundant but have opposite gravitational mass.
The French physicist Luc Blanchet considers an ontology in which dark matter is endowed with a gravitational dipole, to reproduce the MOND phenomenolgy.