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Abstract
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Entanglement and Discord are highly complex
phenomenon, and of great importance in quantum theory
because of its various applications in quantum information
processing. Because of this, here, we study and analyze both of
them according to two coupled two-level atoms with two coupled
quantized fields in the form of a non-degenerate parametric
amplifier type in a cavity. We compare and analyze the effect of
temperature, atom-atom and Kerr–type couplings in quantum
discord and entanglement between the atoms. As a result, it has
been shown that the quantum discord decrease asymptotically to
zero when temperature increase. The results also indicate that
entanglement suddenly disappears during the evaluation, but
quantum discord remains non zero. Then the quantum
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