An atomic system that can be addressed via a single optical mode, hereafter called a one-dimensional atom, is central for many applications in optical quantum technologies. A cavity with a large Purcell factor is required to collect the emission efficiently, but a small Purcell factor is required for long-time memory storage. Here, we introduce an effective and versatile one-dimensional atom consisting of two interacting quantum emitters efficiently coupled to a cavity mode with a large Purcell factor. The dipole–dipole interaction gives rise to a subradiant state with a tunable bandwidth. We demonstrate generation of time-shaped single photons and implementation of quantum memory. We discuss experimental challenges and practical implementation using different systems.

中文翻译：

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具有可调亚辐射态的时频编码单光子生成和宽带单光子存储

可以通过单一光学模式寻址的原子系统（以下称为一维原子）对于光学量子技术中的许多应用至关重要。需要使用具有大赛尔因数的腔来有效地收集发射，但需要小赛尔因数来进行长时间的存储。在这里，我们介绍一种有效且通用的一维原子，该原子由两个相互作用的量子发射器组成，这些量子发射器有效耦合到具有大赛尔因数的腔模。偶极-偶极相互作用产生了具有可调带宽的亚辐射态。我们演示了时间形单光子的生成和量子存储的实现。我们讨论了使用不同系统的实验挑战和实际实现。