INSTITUTO DE FISICA LA PLATA
Unidad Ejecutora - UE
congresos y reuniones científicas
Unified entropic measures of quantum correlations induced by local measurements
BELLOMO, GUIDO; BOSYK, GUSTAVO MARTÍN
Otro; XVIII Giambiagi Winter School QUANTUM CHAOS & CONTROL, Buenos Aires, Argentina; 2016
Departamento de Física, FCEyN - UBA
We introduce quantum correlation measures based on the minimal change in unied entropies induced by local rank one projective measurements, divided by a factor that depends on the generalized purity of the system in the case of nonadditive entropies . In this way, we overcome the issue of the articial increasing of the value of quantum correlation measures based on nonadditive entropieswhen an uncorrelated ancilla is appended to the system, without changing the computability of our entropic correlation measures with respect to the previous ones [2,3]. We recover, as limiting cases, the correlation measuresbased on von Neumann and Rényi entropies (i.e., additive entropies), for which the adjustment factor becomes trivial. In addition, we distinguish between totaland semiquantum correlations and obtain some inequalities between them. Finally, we retrieve analytical expressions for the entropic correlation measures of typicalquantum bipartite systems.