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Monogamy of correlations and entropy inequalities in the Bloch picture

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APPEL Paul HUBER Marcus KLÖCKL Claude

Rok publikování 2020
Druh Článek v odborném periodiku
Časopis / Zdroj JOURNAL OF PHYSICS COMMUNICATIONS
Fakulta / Pracoviště MU

Ústav výpočetní techniky

Citace
www https://iopscience.iop.org/article/10.1088/2399-6528/ab6fb4
Doi http://dx.doi.org/10.1088/2399-6528/ab6fb4
Klíčová slova Entanglement quantification; Entropy inequalities; Sub-additivity
Popis We investigate monogamy of correlations and entropy inequalities in the Bloch representation. Here, both can be understood as direct relations between different correlation tensor elements and thus appear intimately related. To that end we introduce the split Bloch basis, that is particularly useful for representing quantum states with low dimensional support and thus amenable to purification arguments. Furthermore, we find dimension dependent entropy inequalities for the Tsallis 2-entropy. In particular, we present an analogue of the strong subadditivity and a quadratic entropy inequality. These relations are shown to be stronger than subadditivity for finite dimensional cases.
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