Phys. Rev. A 79, 024302 (2009) [4 pages]Bound on trace distance based on superfidelityReceived 24 November 2008; published 5 February 2009 We provide a bound for the trace distance between two quantum states. The lower bound is based on the superfidelity, which provides the upper bound on quantum fidelity. One of the advantages of the presented bound is that it can be estimated using a simple measurement procedure. We also compare this bound with the one provided in terms of fidelity. © 2009 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevA.79.024302
DOI:
10.1103/PhysRevA.79.024302
PACS:
03.67.−a, 03.65.−w, 02.10.Yn
|
|
About | Terms and Conditions | Subscriptions | Search | Help
Use of the American Physical Society websites and journals implies that the user has read and agrees to our Terms and Conditions and any applicable Subscription Agreement. Physical Review®, Physical Review Letters®, Reviews of Modern Physics®, and Physical Review Special Topics® are trademarks of the American Physical Society.