Wiktionary
n. (context physics English) a hypothetical particle that emerges as an excitation of the gravitational field but whose physical properties are virtually indistinguishable from a photon
Wikipedia
In theoretical physics, a graviphoton (aka gravivector) is a hypothetical particle which emerges as an excitation of the metric tensor (i.e. gravitational field) in spacetime dimensions higher than four, as described in Kaluza–Klein theory. However, its crucial physical properties are analogous to a (massive) photon: it induces a "vector force", sometimes dubbed a " fifth force". The electromagnetic potential A emerges from an extra component of the metric tensor g, where the figure 5 labels an additional, fifth dimension.
In gravity theories with extended supersymmetry ( extended supergravities), a graviphoton is normally a superpartner of the graviton that behaves like a photon, and is prone to couple with gravitational strength, as was appreciated in the late 1970s. Unlike the graviton, however, it may provide a repulsive (as well as an attractive) force, and thus, in some technical sense, a type of anti-gravity. Under special circumstances, then, in several natural models, often descending from five-dimensional theories mentioned, it may actually cancel the gravitational attraction in the static limit. Joël Scherk investigated semirealistic aspects of this phenomenon, thereby opening up an ongoing search for physical manifestations of the mechanism.
Usage examples of "graviphoton".
Even human beings could have done it, if they had had access to the necessary gravitons, graviphotons, and grayiscalars, and in all those supplies Wan-To was immensely rich.
He summoned up the necessary graviphotons and graviscalars and hurled them in a carefully designed pattern at that star.
He understood that the three basic mediating particles of the gravitational interaction between masses were what human scientists of the Kaluza-Klein faith would call the vector bosons—the graviton, the graviphoton, and the graviscalar.
A dose of graviphotons, the spin-l repellers, would churn up the star’s insides in a hurry.
When it was sure neither was functioning any longer, Five deployed a small batch of graviphotons to move the larger object away from its presence—not far.
All he had to do was prod at it with a flux of gravitons, graviphotons, and graviscalars, judiciously applied in all the right places, to speed its condensation.