The effect of the agreement between macroscopic and microscopic observations on the quantum probability law was demonstrated. The sample was a collection of magnetic moments all pointing in the same direction. Macroscopic measurement induced a vanishing small disturbance on each individual spin. Microscopic measurements disturbed the spins and randomized the state of the sample according to the quantum probability law. Results indicated that for a large but finite sample the probability law follows, under an assumption on the stability of physical laws against small perturbations.
|Number of pages
|Physical Review A - Atomic, Molecular, and Optical Physics
|Published - May 2002