Nonclassical features of two SC-qubit system interacting with a coherent SC-cavity

In this paper, the dynamics of two charged qubits interacting with a coherent SC-cavity in the presence of the intrinsic decoherence is investigated analytically. Some nonclassical features are discussed as: The behavior of the negativity part of the Wigner function, the Husimi function and its marginal distributions. It is shown that, the intrinsic decoherence has a clearly effect on the negative part of the Wigner function, where it does not vanish completely but reach its stationary value as the intrinsic-decoherence rate increases. A definition of the Husimi distribution for the two SC-qubit and its marginal distributions is described. Further, in the presence of the intrinsic decoherence, the dynamics of the Husimi function of the two-qubit is more robust than its marginal distributions. The phase space quantum coherence of the reduced density matrices is investigated via the Wehrl entropies, which are shown loss of the quantum coherence due to the interaction of coherent SC-cavity with the its system. It is found that, the stationary Wehrl entropies appear quicker due to increasing the intrinsic decoherence rate.