NumCracker

Dear Lubos, if one takes equivalence principle as really serious at microscopic level … what should be the quanta of “inertial forces”?

Lubos Motl

The equivalence principle says that inertia is *equivalent* to gravity, that’s why it’s called the “equivalence” principle.

So if you ever construct a description of inertial forces that uses virtual particles, it’s of course gravitons, the same particles as for gravitational forces, by the equivalence principle!

Your question therefore proves that you did *not* take the equivalence principle seriously yet.

NumCracker

Amazing! So the very existence of gravitons is a frame-dependent (non-covariant) concept … thanks for answering ;-)

— Confusions about the relationships of special relativity and general relativity

— Lubos Motl

2013.09.13 Friday ACHK