Weak measurement

http://en.wikipedia.org/wiki/Weak_measurement

Introduced by Aharonov

Yakir Aharonov, David Z. Albert, and Lev Vaidman (1988). "How the result of a measurement of a component of the spin of a spin-1/2 particle can turn out to be 100"

Introduction to Weak Measurements and Weak Values Boaz Tamir & Eliahu Cohen http://quanta.ws/ojs/index.php/quanta/article/download/14/21

http://physicsworld.com/cws/article/news/2014/oct/09/are-weak-values-quantum-after-all