Strathprints logo
Strathprints Home | Open Access | Browse | Search | User area | Copyright | Help | Library Home | SUPrimo

Optimum detection for extracting maximum information from symmetric qubit sets

Mizuno, Jun and Fujiwara, Mikio and Akiba, Makoto and Kawanishi, Tetsuya and Barnett, Stephen M. and Sasaki, Masahide (2001) Optimum detection for extracting maximum information from symmetric qubit sets. Physical Review A, 65 (1). 012315-1. ISSN 1050-2947

PDF (strathprints005861.pdf)

Download (285kB) | Preview


We demonstrate a class of optimum detection strategies for extracting the maximum information from sets of equiprobable real symmetric qubit states of a single photon. These optimum strategies have been predicted by Sasaki et al. [Phys. Rev. A 59, 3325 (1999)]. The peculiar aspect is that the detections with at least three outputs suffice for optimum extraction of information regardless of the number of signal elements. The cases of ternary (or trine), quinary, and septenary polarization signals are studied where a standard von Neumann detection (a projection onto a binary orthogonal basis) fails to access the maximum information. Our experiments demonstrate that it is possible with present technologies to attain about 96% of the theoretical limit.

Item type: Article
ID code: 5861
Keywords: symmetric qubit sets, detection strategies, photons, von Neumann, optical physics, optics, Optics. Light, Atomic and Molecular Physics, and Optics
Subjects: Science > Physics > Optics. Light
Department: Faculty of Science > Physics
Depositing user: Miss Darcy Spiller
Date Deposited: 30 Apr 2008
Last modified: 20 Oct 2015 20:25

Actions (login required)

View Item View Item