2001/10/10 by G. M. D'Ariano, G.M. D'Ariano, P. Lo Presti +2 · 2 citations
Computer Science · Physics and Astronomy · #Quantum Information and Cryptography #Quantum Mechanics and Applications #Quantum and Classical Electrodynamics #quant-ph
paper · pdf · doi:10.1016/s0375-9601(01)00809-x
published as Phys. Lett. A 292, 233 (2002). · 7 pages. Elsart style
arxiv created 2001/10/10 · openalex publication_date 2002/01/01 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
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.