A unique quasi-probability for projective yes-no measurements
Quantum Physics
2008-04-29 v1
Abstract
From an analysis of projective measurements, it is shown that the Wigner rule is the unique operational quasi-probability for the post-measurement state. A unique pre-measurement quasi-probability is derived from a principle of invariance of measurement disturbance under orthogonal projector complementation. Physical arguments for this principle are given. The informationally complete complex extension of the quasi-probability is also derived. Nonclassicality of this quasi-probability is due to measurement disturbance. The same quasi-probability follows from weak measurements.
Cite
@article{arxiv.0804.4379,
title = {A unique quasi-probability for projective yes-no measurements},
author = {Lars M. Johansen},
journal= {arXiv preprint arXiv:0804.4379},
year = {2008}
}
Comments
4 pages