caa a22 4500 445886242 CHVBK 20180317145600.0 cr unu---uuuuu 170323e20110201xx s 000 0 eng 10.1007/s11128-010-0166-1 doi (NATIONALLICENCE)springer-10.1007/s11128-010-0166-1 Experimentally feasible measures of distance between quantum operations [Elektronische Daten] [Zbigniew Puchała, Jarosław Miszczak, Piotr Gawron, Bartłomiej Gardas] We present two measures of distance between quantum processes which can be measured directly in laboratory without resorting to process tomography. The measures are based on the superfidelity, introduced recently to provide an upper bound for quantum fidelity. We show that the introduced measures partially fulfill the requirements for distance measure between quantum processes. We also argue that they can be especially useful as diagnostic measures to get preliminary knowledge about imperfections in an experimental setup. In particular we provide quantum circuit which can be used to measure the superfidelity between quantum processes. We also provide a physical interpretation of the introduced metrics based on the continuity of channel capacity. Springer Science+Business Media, LLC, 2010 Quantum information nationallicence Quantum noise nationallicence Quantum tomography nationallicence Puchała Zbigniew Institute of Theoretical and Applied Informatics, Polish Academy of Sciences, Bałtycka 5, 44-100, Gliwice, Poland aut Miszczak Jarosław Institute of Theoretical and Applied Informatics, Polish Academy of Sciences, Bałtycka 5, 44-100, Gliwice, Poland aut Gawron Piotr Institute of Theoretical and Applied Informatics, Polish Academy of Sciences, Bałtycka 5, 44-100, Gliwice, Poland aut Gardas Bartłomiej Institute of Theoretical and Applied Informatics, Polish Academy of Sciences, Bałtycka 5, 44-100, Gliwice, Poland aut Quantum Information Processing Springer US; http://www.springer-ny.com 10/1(2011-02-01), 1-12 1570-0755 10:1<1 2011 10 11128 https://doi.org/10.1007/s11128-010-0166-1 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s11128-010-0166-1 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Puchała Zbigniew Institute of Theoretical and Applied Informatics, Polish Academy of Sciences, Bałtycka 5, 44-100, Gliwice, Poland aut NATIONALLICENCE 700 1- Miszczak Jarosław Institute of Theoretical and Applied Informatics, Polish Academy of Sciences, Bałtycka 5, 44-100, Gliwice, Poland aut NATIONALLICENCE 700 1- Gawron Piotr Institute of Theoretical and Applied Informatics, Polish Academy of Sciences, Bałtycka 5, 44-100, Gliwice, Poland aut NATIONALLICENCE 700 1- Gardas Bartłomiej Institute of Theoretical and Applied Informatics, Polish Academy of Sciences, Bałtycka 5, 44-100, Gliwice, Poland aut NATIONALLICENCE 773 0- Quantum Information Processing Springer US; http://www.springer-ny.com 10/1(2011-02-01), 1-12 1570-0755 10:1<1 2011 10 11128 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer