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Intrinsic decoherence effects on measurement-induced nonlocality

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Abstract

By considering an exactly solvable model of a two interacting spin-1/2 qubits described by the Heisenberg anisotropic interaction in the presence of intrinsic decoherence, we study the dynamics of entanglement quantified by the concurrence and measurement-induced nonlocality (MIN) based on Hilbert–Schmidt norm and trace distance with different initial conditions. We highlight the relationship between the entanglement and MIN for the pure initial state. For an initial separable state, it is found that the robustness and the generation of the quantum correlations depend on the physical parameters. While considering the entangled state as an initial state, the results show that despite the phase decoherence, all the correlations reach their steady state values after exhibiting some oscillations. We reveal that the enhancement of correlations may occur by adjusting the strength of the Dzyaloshinskii–Moriya (DM) interaction and the intervention of the magnetic field decrease the quantum correlations. Finally, we show the existence of quantum correlations captured by MIN in the unentangled state.

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Acknowledgements

This work has been financially supported by the Council of Scientific and Industrial Research (CSIR), Government of India under Grant No. 03(1444)/18/EMR-II.

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  1. Center for Nonlinear Science and Engineering, School of Electrical and Electronics Engineering, SASTRA Deemed University, Thanjavur, Tamil Nadu, 613 401, India

    R. Muthuganesan & V. K. Chandrasekar

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  1. R. Muthuganesan
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  2. V. K. Chandrasekar
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Correspondence to R. Muthuganesan.

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Muthuganesan, R., Chandrasekar, V.K. Intrinsic decoherence effects on measurement-induced nonlocality. Quantum Inf Process 20, 46 (2021). https://doi.org/10.1007/s11128-020-02985-y

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