How to ascertain the values of <math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mrow><msub><mrow><mi mathvariant="normal">sigma</mi></mrow><mrow><mi mathvariant="normal">x</mi></mrow></msub></mrow></math>, <math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mrow><msub><mrow><mi mathvariant="normal">σ</mi></mrow><mrow><mi mathvariant="normal">y</mi></mrow></msub></mrow></math>, and <math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mrow><msub><mrow><mi mathvariant="normal">σ</mi></mrow><mrow><mi mathvariant="normal">z</mi></mrow></msub></mrow></math> of a spin-1/2 particle

Lev Vaidman; Yakir Aharonov; David Z. Albert

doi:10.1103/PhysRevLett.58.1385

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

Lev Vaidman, Yakir Aharonov, and David Z. Albert

Phys. Rev. Lett. 58, 1385 – Published 6 April 1987

Abstract

A procedure is described whereby the result of the measurement of any of the three Cartesian components of the spin of a single spin-(1/2) particle at a single time can be inferred with certainty from the result of two other measurements, one of which is carried out before, and the other after, the time in question.

Received 8 September 1986

DOI:https://doi.org/10.1103/PhysRevLett.58.1385

Authors & Affiliations

Lev Vaidman, Yakir Aharonov, and David Z. Albert

Physics Department, University of South Carolina, Columbia, South Carolina 29208, and School of Physics and Astronomy, Tel-Aviv University, Ramat Aviv, Israel