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Abstract
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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.
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