Publication details
Single
-shot discrimination of quantum unitary processes
| Basic information | |
|---|---|
| Original title: | Single-shot discrimination of quantum unitary processes |
| Authors: | Mário Ziman, Michal Sedlák |
| Further information | |
|---|---|
| Citation: | ZIMAN, Mário - SEDLÁK, Michal. Single-shot discrimination of quantum unitary processes. Journal of Modern Optics, Great Britain. ISSN 0950-0340, 2010, vol. 57, no. 3, pp. 253-259. |
| Original language: | English |
| Field: | Informatika |
| WWW: |  http://www.informaworld.com/smpp/content~content=a916357685~db=all~jumptype=rss |
| Type: | Article in Periodical |
| Keywords: | Quantum processes; minimum-error discrimination; unambiguous discrimination |
We formulate minimum-error and unambiguous discrimination problems for quantum processes in the language of process positive operator valued measures (PPOVM). In this framework we present the known solution for minimum-error discrimination of unitary channels. We derive a 'fidelity-like' lower bound on the failure probability of the unambiguous discrimination of arbitrary quantum processes. This bound is saturated (in a certain range of a priori probabilities) in the case of unambiguous discrimination of unitary channels. Surprisingly, the optimal solution for both tasks is based on the optimization of the same quantity called completely bounded process fidelity.
Related projects:
- Highly Parallel and Distributed Computing Systems
- Quantum multipartite computation, communication and security
