Begley Stephen, Vogt Markus, Gulati Gurpreet Kaur, Takahashi Hiroki, Keller Matthias
Department of Physics and Astronomy, University of Sussex, Brighton, BN1 9RH, United Kingdom.
Phys Rev Lett. 2016 Jun 3;116(22):223001. doi: 10.1103/PhysRevLett.116.223001. Epub 2016 May 31.
Recent technological advances in cavity quantum electrodynamics (CQED) are paving the way to utilize multiple quantum emitters confined in a single optical cavity. In such systems, it is crucially important to control the quantum mechanical coupling of individual emitters to the cavity mode. In this regard, combining ion trap technologies with CQED provides a particularly promising approach due to the well-established motional control over trapped ions. Here, we experimentally demonstrate coupling of up to five trapped ions in a string to a high-finesse optical cavity. By changing the axial position and spacing of the ions in a fully deterministic manner, we systematically characterize their coupling to the cavity mode through visibility measurements of the cavity emission. In good agreement with the theoretical model, the results demonstrate that the geometrical configuration of multiple trapped ions can be manipulated to obtain optimal cavity coupling. Our system presents a new ground for exploring CQED with multiple quantum emitters, enabled by the highly controllable collective light-matter interaction.
腔量子电动力学（CQED）领域最近的技术进展正在为利用限制在单个光学腔中的多个量子发射体铺平道路。在这样的系统中，控制单个发射体与腔模的量子力学耦合至关重要。在这方面，将离子阱技术与CQED相结合提供了一种特别有前景的方法，这是由于对捕获离子的运动控制已经很成熟。在这里，我们通过实验证明了一串中多达五个捕获离子与一个高精细度光学腔的耦合。通过以完全确定性的方式改变离子的轴向位置和间距，我们通过腔发射的可见度测量系统地表征了它们与腔模的耦合。结果与理论模型高度吻合，表明可以操纵多个捕获离子的几何构型以获得最佳腔耦合。我们的系统为利用多个量子发射体探索CQED提供了新的平台，这得益于高度可控的集体光与物质相互作用。
