Phys. Rev. A 70, 062316 (2004) [5 pages]Minimum-error discrimination among mirror-symmetric mixed quantum statesReceived 5 July 2004; published 17 December 2004 We provide an exact solution of finding the optimum measurement strategy for distinguishing three mixed quantum states with mirror symmetry. The signal states reside in two-dimensional Hilbert space. By mirror symmetry, two of the three states have the same prior probabilities and transform into each other under the mirror symmetry. We find that the optimum measurement strategy may consist of three, two, or a single nonzero probability operator measure elements depending upon the prior probabilities of the quantum signals. © 2004 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevA.70.062316
DOI:
10.1103/PhysRevA.70.062316
PACS:
03.67.Hk
|
|
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.