In quantum mechanics many propositions are made in probabilities. In 1926 German physicist Max Born postulated that the probability to find a quantum object at a certain place at a certain time equals the square of its wave function. A direct consequence of this rule is the interference pattern as shown in the double slit diffraction experiment.
Born’s rule is one of the key laws in quantum mechanics and it proposes that interference occurs in pairs of possibilities. Interferences of higher order are ruled out. There was no experimental verification of this proposition until now, when the research group led by Prof. Gregor Weihs from the University of Innsbruck and the University of Waterloo has confirmed the accuracy of Born’s law in a triple-slit experiment. “The existence of third-order interference terms would have tremendous theoretical repercussions – it would shake quantum mechanics to the core,“ says Weihs. The impetus for this experiment was the suggestion made by physicists to generalize either quantum mechanics or gravitation – the two pillars of modern physics – to achieve unification, thereby arriving at a one all-encompassing theory. “Our experiment thwarts these efforts once again,“ explains Gregor Weihs.Triple-slit experiment
Dr. Christian Flatz | idw
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