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

29 julio 2014

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.
http://feeds.sciencedaily.com/~r/sciencedaily/~3/jxCvL84yQt4/140729123803.htm

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