Modeling Impurity Noise in NV Centers via Quantum Computers

This work presents a quantum simulation of impurity-induced noise in nitrogen-vacancy (NV) centers in diamond using quantum computing platforms. The study aims to model how spin–spin interactions and environmental impurities affect coherence and entanglement within two-qubit systems. Quantum State Tomography (QST) is employed to reconstruct the density matrix and quantify entanglement through state purity, the Peres–Horodecki criterion, and CHSH inequalities. The results indicate limited entanglement fidelity and the absence of CHSH violation, highlighting the strong influence of impurity noise on the system’s quantum correlations. Future work will focus on improving pulse control (3LS) and leveraging high-performance computational resources to enhance entanglement fidelity, test optimized pulse sequences, and explore more complex quantum simulation scenarios involving NV centers.