Dissonance is Required for Assisted Optimal State Discrimination
Dissonance is Required for Assisted Optimal State Discrimination
复制标题
DOI：
10.1103/physrevlett.107.080401
复制
发表时间：
2011-08-16
影响因子：
8.6
通讯作者：
Alid-Vaccarezza, M.
中科院分区：
文献类型：
--
作者：
Roa, Luis;Retamal, J. C.;Alid-Vaccarezza, M.
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.
