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Phys. Rev. A 64, 062103 (2001) [3 pages]

Upper bound for the success probability of unambiguous discrimination among quantum states

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Shengyu Zhang*, Yuan Feng, Xiaoming Sun, and Mingsheng Ying†
State Key Laboratory of Intelligent Technology and Systems, Department of Computer Science and Technology, Tsinghua University, Beijing, 100084, China

Received 21 June 2001; published 8 November 2001

One strategy to the discrimination problem is to identify the state with certainty, leaving a possibility of undecidability. This paper gives an upper bound for the maximal success probability of unambiguous discrimination among n states. This bound coincides with the known IDP limit when two states are considered.

© 2001 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevA.64.062103
DOI:
10.1103/PhysRevA.64.062103
PACS:
03.65.Ta, 03.65.Ca

*Email address: sy@s1000e.cs.tsinghua.edu.cn

†Corresponding author; email address: yingmsh@tsinghua.edu.cn

 
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