OBSERVERS IN QUANTUM GRAVITY
Jose Manuel Carmona
University of Zaragoza
Observers and their notion of spacetime beyond special relativity
It is plausible that quantum gravity effects may lead us to a description of Nature beyond the framework of special relativity. In this case, either the relativity principle is broken or it is maintained. These two scenarios (a violation or a deformation of special relativity) are very different, both conceptually and phenomenologically. We discuss some of their implications on the description of events for different observers and the definition of a universal or observer-dependent notion of spacetime.