The dynamic behaviors of local quantum uncertainty for three-qubit X states under decoherence channels

• Published in: Quantum information processing Vol. 18; no. 8; pp. 1 - 29
• Main Authors: Slaoui, A., Daoud, M., Ahl Laamara, R.
• Format: Journal Article
• Language: English
• Published: New York Springer US 01.08.2019; Springer Nature B.V
• Subjects: Central processing units; Channels; Correlation analysis; CPUs; Damping; Data Structures and Information Theory; Depolarization; Entangled states; Mathematical Physics; Physics; Physics and Astronomy; Product development; Quantum Computing; Quantum Information Technology; Quantum Physics; Qubits (quantum computing); Spintronics; Uncertainty; Decoherence; Local quantum uncertainty; The quantum channels; Non-classical correlations and discord; Tripartite negativity
• ISSN: 1570-0755; 1573-1332
• DOI: 10.1007/s11128-019-2363-x

We derive the analytical expression of local quantum uncertainty for three-qubit X states. We give also the expressions of quantum discord and the negativity. A comparison of these three quantum correlations quantifiers is discussed in the special cases of mixed GHZ states and Bell-type states. We find that local quantum uncertainty gives the same amount of non-classical correlations as are measured by entropic quantum discord and goes beyond negativity. We also discuss the dynamics of non-classical correlations under the effect of phase damping, depolarizing and phase reversal channels. We find the local quantum uncertainty shows more robustness and exhibits, under phase reversal effect, revival and frozen phenomena. The monogamy property of local quantum uncertainty is also discussed. It is shown that it is monogamous for three-qubit states.