Micro-observables

Just an extra kind of event that wasn’t in the rules

θ1,θ2
If two perturbation events are spacelike separated, they commute.

Deductive closure: the system can heal itself if a perturbation is made

What is the set of commuting observables?

Expectation value of an operator [summed over initial states]

Operator-State Correspondence

Initial state “event”