Standard and Null Weak Values
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.
KeywordsHilbert Space Conditional Probability Measurement Protocol Qubit State Weak Measurement
This work was supported by GIF, the Israel science foundation, Minerva Foundation of the DFG, Israel-Korea MOST grant, and EU GEOMDISS.
- 14.N.S. Williams, A.N. Jordan, Phys. Rev. Lett. 100, 4 (2008) Google Scholar