AI 中文总结
研究远距离量子比特高效通信问题，利用囚禁离子量子处理器数字模拟自旋哈密顿量实现工程化量子通信协议，结合模拟与实验提升量子态转移保真度，实现并行Trotter分解，推动基于哈密顿量的量子通信走向实用。
AI 中文摘要
远距离量子比特间的高效通信是扩展量子处理器的核心挑战之一。虽然工程化自旋链协议在理论上已被广泛研究，但其实验实现仍较为有限。在此，我们通过在IonQ的Forte 1/Forte Enterprise 1囚禁离子量子处理器上进行数字模拟自旋哈密顿量，实验实现了工程化量子通信协议。结合精确数值模拟与量子硬件实验，我们对均匀最近邻和工程化耦合分布进行基准测试，证明工程化相互作用显著提高了量子态转移的保真度。我们还表明，利用自旋哈密顿量的对易结构可实现并行Trotter分解，与传统顺序实现相比，能更忠实地再现目标动力学，同时大幅降低电路深度和执行时间。我们的结果表明，可编程量子处理器能有效实现并高效执行量子通信协议，使基于哈密顿量的量子通信更接近实用量子技术。
英文摘要
Efficient communication between distant qubits is one of the central challenges in scaling quantum processors. Although engineered spin chain protocols have been extensively investigated theoretically, their experimental realization has remained comparatively limited. Here, we experimentally realize engineered quantum communication protocols through digitally simulated spin Hamiltonian on IonQ's Forte 1/ Forte Enterprise 1 trapped-ion quantum processor. Combining exact numerical simulations with quantum hardware experiments, we benchmark uniform nearest-neighbour and engineered coupling profiles and demonstrate that engineered interactions significantly enhance the fidelity of quantum state transfer. We further show that exploiting the commutation structure of the spin Hamiltonian enables a parallel Trotter decomposition that more faithfully reproduces the target dynamics while substantially reducing the circuit depth and execution time compared to the conventional sequential implementations. Our results demonstrate that programmable quantum processors can effectively realize and efficiently implement quantum communication protocols, bringing Hamiltonian-based quantum communication closer to practical quantum technologies.
Comments9 pages, 8 figures
