Experimental Test of Born's Rule by Inspecting Third-Order Quantum Interference on a Single Spin in Solids

摘要

As a fundamental postulate of quantum mechanics, Born's rule assignsprobabilities to the measurement outcomes of quantum systems and excludesmulti-order quantum interference. Here we report an experiment on a single spinin diamond to test Born's rule by inspecting the third-order quantuminterference. The ratio of the third-order quantum interference to thesecond-order in our experiment is ceiled at the scale of $10^{-3}$, whichprovides a stringent constraint on the potential breakdown of Born's rule.