Interfacing solid state single emitters with atomic quantum memories

将固态单发射器与原子量子存储器连接

• 批准号: 2742058
• 金额: --
• 依托单位: University of Bristol
• 依托单位国家: 英国
• 项目类别: Studentship
• 财政年份: 2022
• 资助国家: 英国
• 起止时间: 2022 至 无数据
• 项目状态: 未结题
• 来源: https://gtr.ukri.org/projects?ref=studentship-2742058
• 关键词: Interfacing; solid; state; single; emitters

Single organic molecules such as dibenzoterrylene (DBT) are excellent solid-state sources of single photons. Their emission wavelength coincides with electronic transitions in rubidium (780 - 795 nm) and emission linewidths at low temperature reach the lifetime limit (40 MHz). As such the photons generated using DBT are compatible with various quantum memory protocols using both warm and cold atomic ensembles. This PhD project will investigate routes to enhancing the emission of DBT molecules and increasing the subsequent collection efficiency of photons from single molecules. To do this I will perform nanophotonic modelling and fabrication to make waveguide and cavity structures. These will then be characterized at cryogenic temperature using confocal microscopy and laser fluorescence spectroscopy. Meanwhile, I will develop the apparatus required to demonstrate quantum memory protocols in rubidium. This will involve modelling the quantum memory, building warm atomic vapour setups, building a magneto-optical trap system to create cold clouds of atoms, and using fast intensity modulation of lasers to create the optical pulses needed to store and retrieve photons. Several memory protocols will be investigated including electromagnetically induced transparency, Autler-Townes splitting, off-resonant cascaded absorption, and Raman memories. I will then combine the molecule and atom experiments together to demonstrate the storage and retrieval of photons generated using a single molecule using an atomic vapour. In addition, atomic frequency conversion schemes will be investigated to allow for efficient conversion to telecommunication band photons to enable the possibility of an entanglement swapping across the University of Bristol campus.

诸如二苯并三萘 (DBT) 之类的单一有机分子是极好的单光子固态源。它们的发射波长与铷中的电子跃迁（780 - 795 nm）一致，并且低温下的发射线宽达到寿命极限（40 MHz）。因此，使用 DBT 生成的光子与使用热原子系综和冷原子系综的各种量子存储协议兼容。该博士项目将研究增强 DBT 分子发射并提高随后单分子光子收集效率的途径。为此，我将进行纳米光子建模和制造，以制作波导和腔结构。然后将使用共焦显微镜和激光荧光光谱在低温下对它们进行表征。同时，我将开发演示铷量子存储协议所需的设备。这将涉及对量子存储器进行建模、构建温暖的原子蒸气装置、构建磁光陷阱系统以创建冷原子云，以及使用激光的快速强度调制来创建存储和检索光子所需的光脉冲。将研究几种存储器协议，包括电磁感应透明、奥特勒-汤斯分裂、非共振级联吸收和拉曼存储器。然后，我将把分子和原子实验结合在一起，以演示使用原子蒸气使用单个分子生成的光子的存储和检索。此外，还将研究原子频率转换方案，以实现对电信波段光子的有效转换，从而使布里斯托大学校园内的纠缠交换成为可能。