Name: Jose L Balduz Jr Email: balduz_jl@mercer.edu Affiliation: Mercer University, Dept. Physics (professor) Webpage: physics.mercer.edu/balduz Title: Quantum Observer and Spacetime Hierarchies Abstract: The unification of the theories of matter and spacetime will require that quantum theory and relativity both be modified and generalized. The nonlocal spacetime web is introduced and some basic features of its causal structure are considered. This is compared to the set of relations among quantum observers, which were introduced in a dynamical model of quantum measurements.