Mosley, P.J. and Croke, S. and Walmsley, I.A. and Barnett, S.M. (2006) Experimental realization of maximum confidence quantum state discrimination for the extraction of quantum information. Physical Review Letters, 97 (193601). 193601/1193601/4. ISSN 00319007

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Abstract
We present the first experimental demonstration of the maximum confidence measurement strategy for quantum state discrimination. Applying this strategy to an arbitrary set of states assigns to each input state a measurement outcome which, when realized, gives the highest possible confidence that the state was indeed present. The theoretically optimal measurement for discriminating between three equiprobable symmetric qubit states is implemented in a polarizationbased freespace interferometer. The maximum confidence in the measurement result is 2/3. This is the first explicit demonstration that an improvement in the confidence over the optimal minimum error measurement is possible for linearly dependent states.
Item type:  Article 

ID code:  6156 
Keywords:  quantum, optics, physics, quantum state, qubit, quantum information, Optics. Light, Physics and Astronomy(all) 
Subjects:  Science > Physics > Optics. Light 
Department:  Faculty of Science > Physics 
Depositing user:  Miss Darcy Spiller 
Date Deposited:  16 May 2008 
Last modified:  15 Apr 2015 11:02 
Related URLs:  
URI:  http://strathprints.strath.ac.uk/id/eprint/6156 
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