Phys. Rev. A 66, 032303 (2002) [16 pages]Probe optimization in four-state protocol of quantum cryptographySee Also: Erratum Received 21 December 2001; published 10 September 2002 Following a review of the probe optimization of Slutsky, Rao, Sun, and Fainman [Phys. Rev. A 57, 2383 (1998)] for the standard four-state protocol of quantum key distribution, I generalize the optimization to a variable angle between the signal bases. I calculate the corresponding maximum Renyi information gain by the probe, and determine the optimum probe parameters. A larger set of optimum probe parameters is found for the standard protocol than was known previously. © 2002 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevA.66.032303
DOI:
10.1103/PhysRevA.66.032303
PACS:
03.67.Dd, 03.67.Hk, 03.65.Ta
See AlsoErratum: Howard E. Brandt, Erratum: Probe optimization in four-state protocol of quantum cryptography [Phys. Rev. A 66, 032303 (2002)], Phys. Rev. A 68, 029904 (2003). |
|
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.