Intrinsic decoherence effects on measurement-induced nonlocality

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.

Automated summary

The dynamics of entanglement and measurement-induced nonlocality in a system of two interacting spin-1/2 qubits with intrinsic decoherence were studied under different initial conditions. It was found that the robustness and generation of quantum correlations depend on physical parameters for both pure and separable initial states. Despite phase decoherence, all correlations reach steady state values after exhibiting oscillations, showing that the enhancement of correlations may occur by adjusting the strength of the Dzyaloshinskii-Moriya interaction. Intervention of the magnetic field was found to decrease quantum correlations, and quantum correlations were also observed in unentangled states.