Dissonance is required for assisted optimal state discrimination.
Phys Rev Lett
; 107(8): 080401, 2011 Aug 19.
Article
in En
| MEDLINE
| ID: mdl-21929147
ABSTRACT
The roles of quantum correlations, entanglement, discord, and dissonance needed for performing unambiguous quantum state discrimination assisted by an auxiliary system are studied. In general, this procedure for conclusive recognition between two nonorthogonal states relies on the availability of entanglement and discord. However, we find that there exist special cases for which the procedure can be successfully achieved without entanglement. In particular, we show that the optimal case for discriminating between two nonorthogonal states prepared with equal a priori probabilities does not require entanglement but quantum dissonance only.
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Collection:
01-internacional
Database:
MEDLINE
Type of study:
Prognostic_studies
Language:
En
Journal:
Phys Rev Lett
Year:
2011
Document type:
Article
Affiliation country:
Chile