Fundamental limits to quantum channel discrimination
- Submitting institution
-
University of York
- Unit of assessment
- 11 - Computer Science and Informatics
- Output identifier
- 62780432
- Type
- D - Journal article
- DOI
-
10.1038/s41534-019-0162-y
- Title of journal
- npj Quantum Information
- Article number
- 3
- First page
- -
- Volume
- 5
- Issue
- -
- ISSN
- 2056-6387
- Open access status
- Compliant
- Month of publication
- June
- Year of publication
- 2019
- URL
-
-
- Supplementary information
-
-
- Request cross-referral to
- -
- Output has been delayed by COVID-19
- No
- COVID-19 affected output statement
- -
- Forensic science
- No
- Criminology
- No
- Interdisciplinary
- No
- Number of additional authors
-
3
- Research group(s)
-
-
- Citation count
- 22
- Proposed double-weighted
- No
- Reserve for an output with double weighting
- No
- Additional information
- This work paper established the ultimate performance that is achievable in a fundamental problem of quantum information theory: the optimal discrimination between two arbitrary quantum channels. This result was achieved by exploiting, for the first time, the new protocol of port-based teleportation in the field of quantum hypothesis testing, drawing a deep connection between two apparently-unrelated areas. The work has had a significant influence in recent studies of quantum sensing and metrology, also clarifying the quantum limits of optical resolution at the single photon level. Research funded by the EPSRC quantum communications hub and the European Union.
- Author contribution statement
- -
- Non-English
- No
- English abstract
- -