Non-locality Correlation in Two Driven Qubits Inside an Open Coherent Cavity: Trace Norm Distance and Maximum Bell Function

Abstract

We analytically investigate two separated qubits inside an open cavity field. The cavity is initially prepared in a superposition coherent state. The non-locality correlations [including trace norm measurement induced non-locality, maximal Bell-correlation, and concurrence entanglement] of the two qubits are explored. It is shown that, the generated non-locality correlations crucially depend on the decay and the initial coherence intensity of the cavity field. The enhancement of the initial coherence intensity and its superposition leads to increasing the generated non-locality correlations. The phenomena of sudden birth and death entanglement are found.

Figure 1

Time evolutions of M(t) (dashed dotted plots), B(t) (dashed plots) and C(t) (solid plots) with the dissipative rate γ/λ = 0 and N = 2 for different values of κ = 0 in (a), κ = 1 in (b) and κ = −1 in (c).

Figure 2

As Fig. 1, but with γ = 0.08λ.

Figure 3

As Fig. 1(a), but with α = 0.5.

Figure 4

As Fig. 1, but for α = 0.5 with γ = 0.08λ.