Non-locality Correlation in Two Driven Qubits Inside an Open Coherent Cavity: Trace Norm Distance and Maximum Bell Function

Mohamed, A.-B.A.; Eleuch, Hichem; Ooi, C. H. Raymond

doi:10.1038/s41598-019-55548-2

Cited by 74 publications

(16 citation statements)

References 40 publications

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“…They are operational resources, in modern applications in quantum technology 1 , as: quantum algorithms 2 , quantum computation 3 , and quantum key distribution 4 . Moreover, the quantum effects and quantum correlations have been explored, both theoretically [5][6][7][8][9] and experimentally 10 . Recently, due to the rapid development of the real qubit systems based on the superconducting circuits 11 and quantum dots 12 , the quantum effects have been further investigated [13][14][15] .…”

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confidence: 99%

Quasi-probability information in a coupled two-qubit system interacting non-linearly with a coherent cavity under intrinsic decoherence

Mohamed

Eleuch

2020

Sci Rep

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We explore the phase space quantum effects, quantum coherence and non-classicality, for two coupled identical qubits with intrinsic decoherence. the two qubits are in a nonlinear interaction with a quantum field via an intensity-dependent coupling. We investigate the non-classicality via the Wigner functions. We also study the phase space information and the quantum coherence via the Q-function, Wehrl density, and Wehrl entropy. It is found that the robustness of the non-classicality for the superposition of coherent states, is highly sensitive to the coupling constants. The phase space quantum information and the matter-light quantum coherence can be controlled by the two-qubit coupling, initial cavity-field and the intrinsic decoherence.

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confidence: 99%

Quasi-probability information in a coupled two-qubit system interacting non-linearly with a coherent cavity under intrinsic decoherence

Mohamed

Eleuch

2020

Sci Rep

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“…The amplitudes of the LQFI always greater than those of the BDE. The phenomena of sudden death and growth entanglement [51,52] is appeared in the behavior of the Bures distance entanglement, where the two qubits have non-zero LQFI correlation.…”

Section: Dynamics Of the Correlation Quantifiersmentioning

confidence: 99%

Quantum Fisher Information and Bures Distance Correlations of Coupled Two Charge-Qubits Inside a Coherent Cavity with the Intrinsic Decoherence

et al. 2021

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The dynamics of two charged qubits containing Josephson Junctions inside a cavity are investigated under the intrinsic decoherence effect. New types of quantum correlations via local quantum Fisher information and Bures distance norm are explored. We show that we can control the quantum correlations robustness by the intrinsic decoherence rate, the qubit-qubit coupling as well as by the initial coherent states superposition. The phenomenon of sudden changes and the freezing behavior for the local quantum Fisher information are sensitive to the initial coherent state superposition and the intrinsic decoherence.

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“…Nonclassical correlations (NCs) and quantum entanglement (QE) are substantial as tools for quantum information [ 1 , 2 , 3 , 4 , 5 ]. Therefore, the generation of two-qubit correlated states has been extensively investigated [ 3 , 6 , 7 , 8 ]. QE is an important type of NC, but it is not a unique resource in nonclassical correlations [ 9 ].…”

Section: Introductionmentioning

confidence: 99%

Two-Qubit Local Fisher Information Correlation beyond Entanglement in a Nonlinear Generalized Cavity with an Intrinsic Decoherence

Mohamed

Khalil

Yassen

et al. 2021

Entropy

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In this paper, we study a Hamiltonian system constituted by two coupled two-level atoms (qubits) interacting with a nonlinear generalized cavity field. The nonclassical two-qubit correlation dynamics are investigated using Bures distance entanglement and local quantum Fisher information under the influences of intrinsic decoherence and qubit–qubit interaction. The effects of the superposition of two identical generalized coherent states and the initial coherent field intensity on the generated two-qubit correlations are investigated. Entanglement of sudden death and sudden birth of the Bures distance entanglement as well as the sudden changes in local Fisher information are observed. We show that the robustness, against decoherence, of the generated two-qubit correlations can be controlled by qubit–qubit coupling and the initial coherent cavity states.

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Non-locality Correlation in Two Driven Qubits Inside an Open Coherent Cavity: Trace Norm Distance and Maximum Bell Function

Cited by 74 publications

References 40 publications

Quasi-probability information in a coupled two-qubit system interacting non-linearly with a coherent cavity under intrinsic decoherence

Quasi-probability information in a coupled two-qubit system interacting non-linearly with a coherent cavity under intrinsic decoherence

Quantum Fisher Information and Bures Distance Correlations of Coupled Two Charge-Qubits Inside a Coherent Cavity with the Intrinsic Decoherence

Two-Qubit Local Fisher Information Correlation beyond Entanglement in a Nonlinear Generalized Cavity with an Intrinsic Decoherence

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