Article,

Quantum measurement: A light touch

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Nature, 463 (7283): 890--891 (Feb 18, 2010)
DOI: 10.1038/463890a

Abstract

A technique used primarily to study fundamental issues in quantum mechanics has now been shown to have promise as a powerful practical tool for making ultra-precise measurements. 'Weak measurement', a technique invented by Aharonov and co-workers1 about 20 years ago, is a way of probing a quantum system so gently that the famous measurement disturbance guaranteed by Heisenberg's uncertainty principle becomes negligible. Its discovery opened the door for investigation of all manner of quantum phenomena previously deemed inaccessible.

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