IFLP   13074
INSTITUTO DE FISICA LA PLATA
Unidad Ejecutora - UE
artículos
Título:
Comment on "Quantum discord through the generalized entropy in bipartite quantum states"
Autor/es:
GUIDO BELLOMO; ANGELO PLASTINO; ANNA P. MAJTEY; ANGEL R. PLASTINO
Revista:
EUROPEAN PHYSICAL JOURNAL D
Editorial:
SPRINGER
Referencias:
Lugar: Berlin; Año: 2014 vol. 68 p. 337 - 340
ISSN:
1434-6060
Resumen:
In [X.-W. Hou, Z.-P. Huang, S. Chen, Eur. Phys. J. D 68, 1 (2014)], Hou et al. present, using Tsallis? entropy, possible generalizations of the quantum discord measure, finding original results. As for the mutual informations and discord, we show here that these two types of quantifiers can take negative values.In the two qubits instance we further determine in which regions they are non-negative. Additionally, we study alternative generalizations on the basis of R´enyi entropies.