Manning, Andrew; Khakimov, Roman; Dall, Robert; Truscott, Andrew
The wave-particle dual nature of light and matter and the fact that the choice of measurement determines which one of these two seemingly incompatible behaviours we observe are examples of the counterintuitive features of quantum mechanics. They are illustrated by Wheeler's famous 'delayed-choice experiment, recently demonstrated in a single-photon experiment. Here, we use a single ultracold metastable helium atom in a Mach-Zehnder interferometer to create an atomic analogue of Wheeler's...[Show more]
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