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Optimal State Discrimination Using Particle Statistics

Abstract:
We present an application of particle statistics to the problem of optimal ambiguous discrimination of quantum states. The states to be discriminated are encoded in the internal degrees of freedom of identical particles, and we use the bunching and antibunching of the external degrees of freedom to discriminate between various internal states. We show that we can achieve the optimal single-shot discrimination probability using only the effects of particle statistics. We discuss interesting applications of our method to detecting entanglement and purifying mixed states. Our scheme can easily be implemented with the current technology.
Publication status:
Published

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Publisher copy:
10.1103/PhysRevA.68.052309

Authors

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Institution:
University of Oxford
Division:
MPLS
Department:
Physics
Sub department:
Atomic & Laser Physics
Role:
Author


Journal:
Phys. Rev. A More from this journal
Volume:
68
Issue:
5
Pages:
052309
Publication date:
2003-09-10
DOI:
EISSN:
1094-1622
ISSN:
1050-2947


Language:
English
Keywords:
Pubs id:
pubs:156877
UUID:
uuid:01cb6402-fa59-48ea-a464-8d3373ded297
Local pid:
pubs:156877
Source identifiers:
156877
Deposit date:
2012-12-19
ARK identifier:

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