Title :
Optimal discrimination between overcomplete states
Author :
Clarke, Roger ; Kendon, V.M. ; Riis, E. ; Barnett, S.M. ; Chefles, A.
Author_Institution :
Dept. of Phys. & Appl. Phys., Strathclyde Univ., Glasgow, UK
Abstract :
Summary form only given. We show how to discriminate between overcomplete sets of quantum states with minimum error probabilities. It is not possible to distinguish reliably between non-orthogonal states, but given a specific set of N states (N>2 for a two-state system) one can ask how well can they be distinguished. The answer is different depending on whether you want the minimum error, or the maximum information.
Keywords :
Poincare mapping; light interferometry; light polarisation; quantum communication; quantum optics; Poincare sphere; anti-trine states; elliptically polarised states; free-space interferometer; linearly polarised states; maximum information; minimum error probabilities; nonorthogonal states; optimal discrimination; overcomplete states; polarising beam splitters; quantum states; tetrad states; trine states; two-state system; Error probability; Laser modes; Mutual information; Optical interferometry; Optical network units; Optical polarization; Optical pulses; Physics; Ring lasers; Testing;
Conference_Titel :
Quantum Electronics Conference, 2000. Conference Digest. 2000 International
Conference_Location :
Nice, France
Print_ISBN :
0-7803-6318-3
DOI :
10.1109/IQEC.2000.908153
