Separating particles from their properties

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Separating particles from their properties

The Quantum Cheshire Cat: Can neutrons be located at a different place than their own spin?

Date:
July 29, 2014

Source:
Vienna University of Technology, TU Vienna

Summary:
Can neutrons be located at a different place than their own spin? A quantum experiment demonstrates a new kind of quantum paradox. The Cheshire Cat featured in Lewis Caroll's novel "Alice in Wonderland" is a remarkable creature: it disappears, leaving its grin behind. Can an object be separated from its properties? It is possible in the quantum world. In an experiment, neutrons travel along a different path than one of their properties -- their magnetic moment. This "Quantum Cheshire Cat" could be used to make high precision measurements less sensitive to external perturbations.

Full Article/Source:
http://www.sciencedaily.com/releases/2014/07/140729123803.htm

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