Spin-measurement retrodiction

1 February 1989

journal article
research article
Published by American Physical Society (APS) in Physical Review A

Vol. 39 (4) , 1621-1627
https://doi.org/10.1103/physreva.39.1621

Abstract

We address the problem of choosing an initial state and final measurement that enable maximal retrodiction of the result of an unknown intermediate spin measurement of a spin-(1/2 particle, along any one of a given set of directions. Details are given of the derivation of the most general possible solution of the problem, which we reported recently. The maximal retrodiction is shown to be the determination of the result of the intermediate spin measurement, along any of four different directions that span three-dimensional space and satisfy a specific linear relation.

Keywords

This publication has 1 reference indexed in Scilit:

How to ascertain the values of ${sigma}_{x}$ , $σ_{y}$ , and $σ_{z}$ of a spin-1/2 particle
Physical Review Letters, 1987