Understand
We propose a deepening of the relativity principle according to which the invariant arena for non-quantum physics is a phase space rather than spacetime.
- Descriptions of particles propagating and interacting in spacetimes are constructed by observers, but different observers, separated from each other by translations, construct different spacetime projections from the invariant phase space.
- Nonetheless, all observers agree that interactions are local in the spacetime coordinates constructed by observers local to them.
- This framework, in which absolute locality is replaced by relative locality, results from deforming momentum space, just as the passage from absolute to relative simultaneity results from deforming the linear addition of velocities.
Reading the bibliography…