Noncommutative spacetime effects and gravitation

Abstract

In recent years Quantum Superstrings and Quantum Gravity approaches have come to rely on non differenciable spacetime manifolds. These throw up a noncommutative spacetime geometry and we consider the origin of mass and a related modification of the Dirac equation in this context. This also throws some light on gravitation itself.

8 pages, based on two papers accepted for publication in Int.J.Mod.Phys.E