Standard and null weak values

Zilberberg, Oded and Romito, Alessandro and Gefen, Yuval (2014) Standard and null weak values. In: Quantum Theory. Springer-Verlag Milan, Milan, pp. 377-387. ISBN 9788847052161

Abstract

Weak value (WV) is a quantum mechanical measurement protocol, proposed by Aharonov, Albert, and Vaidman. It consists of a weak measurement, which is weighed in, conditional on the outcome of a later, strong measurement. Here we define another two-step measurement protocol, null weak value (NVW), and point out its advantages as compared to WV. We present two alternative derivations of NWVs and compare them to the corresponding derivations of WVs.