腔耦合量子输运中的单向暗态到亮态的拯救
Unidirectional Dark-to-Bright Rescue in Cavity-Coupled Quantum Transport
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中文总结 AI 辅助
该研究针对腔耦合量子输运中暗态导致的能量被困问题，利用激子-声子耦合的非对角部分开辟单向逃逸路径，实现暗态到亮态的不可逆布居转移，提升输运效率并拓展暗态的应用场景。
中文摘要 AI 辅助
光学微腔中的强光-物质耦合可在发射体阵列间弹道式传输能量，但这种耦合会将大部分激发态隐藏在随系统尺寸增长的暗态流形中，使能量被困在传输通道之外。我们表明，激子-声子耦合的非对角（非康登）部分开辟了一条从该陷阱中单向逃逸的路径，使布居数不可逆地从暗态进入辐射通道。该速率由光子权重守恒定律决定，而非暗-亮态重叠，后者以与系统尺寸无关的速率排空暗态流形。该机制为输运贡献了接近完全的效率，具有四个特征：单指数暗态衰减、尺寸标度效率间隙、不同的温度行为以及在振动热浴模式下逃逸速率的共振。除了极化子输运外，它还将暗态从寄生损耗通道转变为可设计的耗散资源，对光捕获和基于耗散的量子控制具有重要意义。
英文摘要
Strong light-matter coupling in optical microcavities can transport energy ballistically across an emitter array, but the same coupling buries most of the excitation in a manifold of dark states that grows with system size and traps energy outside the transport channel. We show that the off-diagonal (non-Condon) part of the exciton-phonon coupling opens a one-way escape route from this trap, driving population irreversibly from dark states into the radiative channel. This rate is fixed by a photonic-weight conservation law rather than by dark-bright overlap which evacuates the dark manifold at a rate independent of system size. The mechanism contributes to transport with near-complete efficiency with four signatures being single exponential dark state decay, a size scaling efficiency gap, distinct temperature behavior, and a resonance in the escape rate at vibrational bath modes. Beyond polariton transport, it recasts dark states from a parasitic loss channel into an engineered dissipative resource, with implications for light harvesting and dissipation based quantum control.
