Discriminating States: The Quantum Chernoff Bound

Autor(en)

Koenraad M R Audenaert, J. Calsamiglia, R. Munoz-Tapia, E Bagan, L. Masanes, Antonio Acin, Frank Verstraete

Abstrakt

We consider the problem of discriminating two different quantum states in the setting of asymptotically many copies, and determine the minimal probability of error. This leads to the identification of the quantum Chernoff bound, thereby solving a long-standing open problem. The bound reduces to the classical Chernoff bound when the quantum states under consideration commute. The quantum Chernoff bound is the natural symmetric distance measure between quantum states because of its clear operational meaning and because it does not seem to share some of the undesirable features of other distance measures.

Organisation(en)

Quantenoptik, Quantennanophysik und Quanteninformation

Externe Organisation(en)

Imperial College London, Universitat Autònoma de Barcelona , University of Cambridge, The Institute of Photonic Sciences

Journal

Physical Review Letters

Band

98

Anzahl der Seiten

4

ISSN

0031-9007

DOI

https://doi.org/10.1103/PhysRevLett.98.160501

Publikationsdatum

04-2007

Peer-reviewed

Ja

ÖFOS 2012

103025 Quantenmechanik

Link zum Portal

https://ucrisportal.univie.ac.at/de/publications/957b2752-f0b6-47f7-b0e2-ca90e3f98afd