When you observe a particle, you see it in a superposition of a indefinite number of states.
A photon moves at the speed of light, it does not experience the flow of time because of that, its whole lifetime is an instant from its point of view, and it "sees" the universe in the superposition of the states the universe goes through.
Similarly, the indefinite number of states of the particle could be observing a development in a time dimension in which the time does not flow for the observer.
They say, one man's instant, another man's eternity...
A photon moves at the speed of light, it does not experience the flow of time because of that, its whole lifetime is an instant from its point of view, and it "sees" the universe in the superposition of the states the universe goes through.
Similarly, the indefinite number of states of the particle could be observing a development in a time dimension in which the time does not flow for the observer.
They say, one man's instant, another man's eternity...