Fig. 1
From: Decoherence of quantum local fisher and uncertainty information in two-qubit NV centers
The dynamics of LQFI, LQU, and concurrence for two NV-center qubits are illustrated under the following parameter settings: gyromagnetic factor \(\chi =0.5\), inter-qubit distance \(r=1\), external magnetic field \(B_z=0.5\), external control electric field \(E_x=2\), and dipole-dipole interaction strength \(\Gamma =0.4\) for different zero-field splitting strengths \(D_{B}=D_{A}-0.3\) and \(D_{A}=0.8\) in (a), and \(D_{A}=2.5\) in (b). The intrinsic decoherence is taken with a small coupling: \(1/\gamma = 5\times 10^{-5}\).
