caa a22 4500 445865873 CHVBK 20180317145457.0 cr unu---uuuuu 170323e20110801xx s 000 0 eng 10.1140/epjd/e2011-10729-8 doi (NATIONALLICENCE)springer-10.1140/epjd/e2011-10729-8 Programmed discrimination of qbits with added classical information [Elektronische Daten] [A. Colin, S. Barnett, J. Jeffers] We investigate some properties of programmed quantum-state discriminators with simple programs. Bergou et al. [Phys. Rev. A 73, 062334 (2006)] have considered programmable devices which are supplied with two distinct but unknown program qbits and one data qbit which is certain to be identical to one or other of the program qbits. The task is to discriminate between the first and the second possibility. In this paper, we consider this state-discrimination problem when there is some additional classical information available. We find that in the minimum error discrimination mode, the probability of correct discrimination is increased by each type of classical information. The same is broadly true of unambiguous discrimination, with the chance of success improving when the overlap between the program qbits is reduced. EDP Sciences, SIF, Springer-Verlag Berlin Heidelberg, 2011 Colin A. Department of Physics, Scottish Universities Physics Alliance, Strathclyde University, John Anderson Building, 107 Rottenrow, G4 0NG, Glasgow, UK aut Barnett S. Department of Physics, Scottish Universities Physics Alliance, Strathclyde University, John Anderson Building, 107 Rottenrow, G4 0NG, Glasgow, UK aut Jeffers J. Department of Physics, Scottish Universities Physics Alliance, Strathclyde University, John Anderson Building, 107 Rottenrow, G4 0NG, Glasgow, UK aut The European Physical Journal D Springer-Verlag 63/3(2011-08-01), 463-472 1434-6060 63:3<463 2011 63 10053 https://doi.org/10.1140/epjd/e2011-10729-8 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1140/epjd/e2011-10729-8 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Colin A. Department of Physics, Scottish Universities Physics Alliance, Strathclyde University, John Anderson Building, 107 Rottenrow, G4 0NG, Glasgow, UK aut NATIONALLICENCE 700 1- Barnett S. Department of Physics, Scottish Universities Physics Alliance, Strathclyde University, John Anderson Building, 107 Rottenrow, G4 0NG, Glasgow, UK aut NATIONALLICENCE 700 1- Jeffers J. Department of Physics, Scottish Universities Physics Alliance, Strathclyde University, John Anderson Building, 107 Rottenrow, G4 0NG, Glasgow, UK aut NATIONALLICENCE 773 0- The European Physical Journal D Springer-Verlag 63/3(2011-08-01), 463-472 1434-6060 63:3<463 2011 63 10053 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer