A quantum measurement of the spin direction
Quantum Physics
2009-11-07 v1
Abstract
We give a first physical model for the quantum measurement of the spin direction. It is an Arthurs-Kelly model that involves a kind of magnetic-dipole interaction of the spin with three modes of radiation. We show that in a limit of infinite squeezing of radiation the optimal POVM for the measurement of the spin direction is achieved for spin 1/2.
Cite
@article{arxiv.quant-ph/0110065,
title = {A quantum measurement of the spin direction},
author = {G. M. D'Ariano and P. Lo Presti and M. F. Sacchi},
journal= {arXiv preprint arXiv:quant-ph/0110065},
year = {2009}
}
Comments
7 pages. Elsart style