ERIC HELLER / SCIENCE PHOTO LIBRARY ERIC HELLER / SCIENCE PHOTO LIBRARY
Scarred quantum wave. Computer model showing the paths taken by a wave trapped inside a stadium- shaped cavity. The paths show the movement of a particle which is behaving like a wave (showing wave-particle duality), as it bounces around the cavity. The pattern has features characteristic of classical and quantum mechanics. It is similar to a random quantum wave, formed by randomly adding together waves travelling in all directions. However, it is known as a scarred quantum wave, because it features classical periodic orbits (repeating paths) which give it symmetry, forming a "double diamond". Modelled by Professor Eric Heller at Harvard University, USA.
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