:::::Actually, any quantum theory of gravity, whether it reduces to GR at large scales or not, requires gravitons ''by definition''. Do you even understand what a graviton ''is''? ''The quantum of a gravitational field.'' Just as any quantum theory of electromagnetism ''must'' include the photon in its particle spectrum, any quantum theory of gravity ''must'' include the graviton in its particle spectrum. And yes, string theory requires them; the entire reason string theory started being developed as a theory of everything is that gravitons (i.e. massless spin-2 bosons) naturally appear as part of its particle spectrum! [[User:Yill|Yill]] 14:57, 6 April 2010 (EDT) | :::::Actually, any quantum theory of gravity, whether it reduces to GR at large scales or not, requires gravitons ''by definition''. Do you even understand what a graviton ''is''? ''The quantum of a gravitational field.'' Just as any quantum theory of electromagnetism ''must'' include the photon in its particle spectrum, any quantum theory of gravity ''must'' include the graviton in its particle spectrum. And yes, string theory requires them; the entire reason string theory started being developed as a theory of everything is that gravitons (i.e. massless spin-2 bosons) naturally appear as part of its particle spectrum! [[User:Yill|Yill]] 14:57, 6 April 2010 (EDT) |