Towards single-photon switching via two-photon absorption in Rb vapour

通过铷蒸气中的双光子吸收实现单光子切换

• 批准号: 2283503
• 金额: --
• 依托单位: University of Bath
• 依托单位国家: 英国
• 项目类别: Studentship
• 财政年份: 2019
• 资助国家: 英国
• 起止时间: 2019 至 无数据
• 项目状态: 已结题
• 来源: https://gtr.ukri.org/projects?ref=studentship-2283503
• 关键词: Towards; single; photon; switching; via

If we could induce a strong interaction between photons (mediated by atoms), this would allow the implementation of quantum logic operations at room temperature, opening the way to scalable (cryogenics-free) quantum computing. A strong candidate for engineering such interactions is the combination of optical waveguides and cavities with alkali vapours. We have the unique capability to explore this area at the CPPM in Bath. In this project, we will seek to experimentally test a proposal to switch the phase of a signal photon based on the presence of a control photon impinging on a cavity coupled to the two-photon absorption line in rubidium. This is a very ambitious goal, but there are a number of interesting tasks that will lead up to it. First, we will investigate switching in a fibre-based ring-cavity, which could have applications in photonic buffering and routing. In parallel we will develop a theoretical model for the two-photon interactions in a vapour-filled ring cavity. It will also be necessary to develop techniques to fabricate bubble resonators and fibre tapers, and a vacuum system enable us to load the resonator with rubidium. Each of these steps will provide opportunities to publish.

如果我们能够诱导光子之间的强相互作用（由原子介导），这将允许在室温下实现量子逻辑运算，从而为可扩展（无低温）量子计算开辟道路。设计这种相互作用的一个强有力的候选者是将光波导和空腔与碱蒸气相结合。我们拥有在巴斯的 CPPM 探索这一领域的独特能力。在这个项目中，我们将寻求通过实验测试一种基于控制光子撞击与铷中的双光子吸收线耦合的空腔来切换信号光子相位的提议。这是一个非常雄心勃勃的目标，但实现这一目标还有许多有趣的任务。首先，我们将研究基于光纤的环形腔中的切换，这可能在光子缓冲和路由方面有应用。与此同时，我们将开发一个关于充满蒸汽的环腔中双光子相互作用的理论模型。还需要开发制造气泡谐振器和光纤锥体的技术，并且真空系统使我们能够在谐振器中装载铷。每个步骤都将提供发布的机会。