消除长程激子输运中的辐射损失
Eliminating radiative losses in long-range exciton transport
摘要：
我们证明，它是可能的，以有效地消除激子能量输运过程中的固有能量梯度系统的辐射损失。通过考虑链状系统的重复的“单位”细胞，每个可以由多个网站，我们表明，调整一个单一的系统参数（内的单位细胞耦合）导致有效的和高度稳健的运输相对较长的距离。这种显着的运输性能示出起源于分区系统的本征态到能量分离的明亮和黑暗的子空间，允许长距离运输进行有效地通过本征态的“暗链”。最后，我们讨论了固有偶极矩的影响，这是特别相关的分子结构，并证明适当对齐的偶极子可以导致额外的保护，防止其他（非辐射）损失过程。我们的无量纲开放量子系统模型被设计为广泛适用于一系列的实验平台。
英文摘要：
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.
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