Nonclassical Correlations in a Three-Mode Continuous-Variable System

Nonclassical Correlations in a Three-Mode Continuous-Variable System

We investigate a standard measure of quantum discord for tripartite coherent states of the Greenberger–Horne–Zeilinger (GHZ) type. Furthermore, we check the monotonicity of a superquantum discord according to weak quantum measurements. We accomplish our study by manipulating the amount of quantum in...

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Veröffentlicht in:Journal of Russian laser research 2017, Vol.38 (1), p.27-36
Hauptverfasser: Siyouri, F., Ziane, M., El Baz, M., Hassouni, Y.
Format: Artikel
Sprache:eng
Schlagworte:
Continuity (mathematics)
Lasers
Microwaves
Optical Devices
Optics
Perturbation methods
Photonics
Physics
Physics and Astronomy
Quantum entanglement
Quantum phenomena
Quantum theory
RF and Optical Engineering
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Zusammenfassung:We investigate a standard measure of quantum discord for tripartite coherent states of the Greenberger–Horne–Zeilinger (GHZ) type. Furthermore, we check the monotonicity of a superquantum discord according to weak quantum measurements. We accomplish our study by manipulating the amount of quantum information lost during the perturbation of the quantum system and controlling the measurement strength. In addition, we calculate the entanglement of the system under study. Finally we compare the behavior of the three correlations.
ISSN:1071-2836
1573-8760
DOI:10.1007/s10946-017-9617-9