مشخصات پژوهش

We study quantum discord dynamic of two atomic qubits moving inside a leaky cavity, where the two-qubit system is driven by a classical field. We suppose that the qubits are coupled to each other through dipole-dipole interaction and interacting asymmetrically with the cavity field via a two-photon relaxation. Using the time-dependent Schrödinger equation, we obtain the quantum state of the two-qubit system and study the dynamical behavior of the corresponding quantum discord. We discuss in detail the effects of the dipole-dipole interaction, atomic motion, atom-cavity coupling strength, classical driving and detuning between the qubit and the classical field (laser detuning) on the protection of initial qubit-qubit correlation in both the Markovian and non-Markovian regimes. We show that the dipole-dipole interaction and laser detuning destroy the initial correlation between the qubits in the stationary limit, however, the classical driving can effectively eliminate their destructive effects on the maintaining the initial correlation.