实现完美态转移的干涉工程化捷径
Interference-engineered shortcut to perfect state transfer
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中文总结 AI 辅助
本文提出演化暂停合成（EPS）协议，在系统本征哈密顿量内实现快速近完美态转移，将其应用于朗道-齐纳动力学和STIRAP过程实现11.8倍加速，在硅光子平台实验验证，为相干控制提供硬件兼容框架。
中文摘要 AI 辅助
实现快速、高保真的态转移是可扩展集成光子学和量子信息处理的基础。绝热演化虽具有抵抗控制和制备缺陷的固有鲁棒性，但其对缓慢驱动的要求会导致光子电路中传播距离过长，难以实际应用。现有加速策略如绝热捷径（STA）可大幅缩短演化时间，但通常依赖非本征辅助耦合或复杂的哈密顿量工程，实际中难以实现。本文提出演化暂停合成（EPS），一种干涉工程化的捷径协议，严格在系统本征哈密顿量内实现快速、近完美的态转移。其通过将瞬态激发视为相干资源，利用策略性插入的暂停抵消其累积振幅，实现该目标。通过将相对动力学相位积累与参数变化解耦，EPS将开放的跃迁轨迹引导至复振幅空间中的闭合回路，无需辅助场或复杂参数迂回即可实现完美态转移。我们在朗道-齐纳动力学中演示该机制，并将其扩展至多能级受激拉曼绝热通道（STIRAP）过程，相比绝热基线实现11.8倍的加速。此外，我们在硅光子平台上实验验证EPS，在16μm的 footprint（器件尺寸）中实现高保真态转移，与150μm的绝热参考相比，器件长度缩短近10倍。EPS为跨波动和量子平台的快速、实用相干控制提供了通用的硬件兼容框架。
英文摘要
Achieving fast, high-fidelity state transfer is fundamental to scalable integrated photonics and quantum information processing. While adiabatic evolution provides inherent robustness against control and fabrication imperfections, its requirement for slow driving leads to impractically long propagation distances in photonic circuits. Existing acceleration strategies, such as shortcuts to adiabaticity (STA), can dramatically shorten evolution times but generally rely on non-native auxiliary couplings or delicate Hamiltonian engineering that are difficult to implement in practice. Here we introduce evolution-pause synthesis (EPS), an interference engineered shortcut protocol that achieves fast, near-perfect state transfer strictly within the native system Hamiltonian. It achieves this by treating transient excitations as coherent resources and canceling their accumulated amplitudes via strategically interleaved pauses. By decoupling relative dynamical phase accumulation from parameter variations, EPS steers open transition trajectories into a closed loop in complex amplitude space, enabling perfect state transfer without auxiliary fields or complex parameter detours. We demonstrate this mechanism in Landau-Zener dynamics and extend it to a multilevel STIRAP process, achieving an 11.8-fold acceleration over the adiabatic baseline. Further, we experimentally validate EPS on a silicon photonic platform, realizing high-fidelity state transfer in a $16\,μ\mathrm{m}$ footprint, a nearly tenfold reduction in device length compared with a $150\,μ\mathrm{m}$ adiabatic reference. EPS offers a general hardware-compatible framework for fast, practical coherent control across wave and quantum platforms.
