Comparative analysis of robust entanglement generation in engineered XX spin chains

We numerically compare two entanglement gener- Although effective Hamiltonians are derived, our concluation protocols in finite XX spin chains with spin magnitudes sions rely on numerical data. Importantly, we observe that the s = 1/2, 1, 3/2. Protocol 1 (P1) uses staggered couplings to create dual-port databus protocol (P2) enables faster and more robust entanglement in its extremes, while Protocol 2 (P2) adopts a dual-port architecture with optimized boundary fields to medi- entanglement generation than the staggered (P1) scheme, ate virtual excitations between terminal spins. P2 consistently especially in the presence of noise and imperfections. Our outperforms P1 across all spin values, generating higher-fidelity results are relevant to systems such as trapped ions [11], entanglement in shorter times. It also shows greater robustness superconducting qubit arrays [12], NV centers in diamond under realistic imperfections. The scalability, efficiency, and noise [13], and quantum dot devices [14], where engineered spinresilience of P2 make it a strong candidate for entanglement spin interactions and coherent control have been realized. distribution in solid-state quantum technologies. This work thus paves the way for deterministic and scalable