论文标题
消除远程激子传输中的辐射损失
Eliminating radiative losses in long-range exciton transport
论文作者
论文摘要
我们证明，在具有内在能量梯度的系统中，在激子能量传输过程中有效消除了辐射损失。通过考虑重复每个可以由多个位点组成的链状系统，我们表明调整单个系统参数（单个单元内耦合）会导致在相对较长的距离内有效且高度强大的运输。这种显着的运输性能显示出源于系统本征态分为能量分离的明亮和黑暗子空间，从而使远距离传输通过特征态的“暗链”有效地进行。最后，我们讨论了与分子体系结构特别相关的固有偶极矩的影响，并证明适当平选的偶极子可以导致对其他（非辐射性）损失过程的额外保护。我们的无尺寸开放量子系统模型旨在广泛适用于一系列实验平台。
We demonstrate that it is possible to effectively eliminate radiative losses during excitonic energy transport in systems with an intrinsic energy gradient. By considering chain-like systems of repeating `unit' cells which can each consist of multiple sites, we show that tuning a single system parameter (the intra-unit-cell coupling) leads to efficient and highly robust transport over relatively long distances. This remarkable transport performance is shown to originate from a partitioning of the system's eigenstates into energetically-separated bright and dark subspaces, allowing long range transport to proceed efficiently through a `dark chain' of eigenstates. Finally, we discuss the effects of intrinsic dipole moments, which are of particular relevance to molecular architectures, and demonstrate that appropriately-aligned dipoles can lead to additional protection against other (non-radiative) loss processes. Our dimensionless open quantum systems model is designed to be broadly applicable to a range of experimental platforms.
