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.

单个有机分子（例如Dibenzoterrylene（DBT））是单个光子的出色固态来源。它们的发射波长与rubidium（780-795 nm）中的电子跃迁和低温达到寿命极限（40 MHz）的发射线宽相吻合。因此，使用DBT生成的光子与使用温暖和冷原子合体的各种量子存储器协议兼容。该博士学位项目将研究增强DBT分子发射的路线，并提高单分子的随后收集效率。为此，我将执行纳米光子建模和制造，以制造波导和空腔结构。然后将使用共聚焦显微镜和激光荧光光谱在低温温度下进行表征。同时，我将开发在Rubidium中演示量子记忆协议所需的设备。这将涉及建模量子记忆，建立温暖的原子蒸气设置，建立磁光陷阱系统以创建原子的冷云，并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。将研究几种记忆方案，包括电磁诱导的透明度，自动镇分裂，非谐波吸收和拉曼记忆。然后，我将将分子和原子实验结合在一起，以证明使用原子蒸气使用单个分子产生的光子的存储和检索。此外，将研究原子频率转换方案，以允许有效的转换到电信带光子，以使可能在布里斯托尔大学校园进行纠缠交换的可能性。