Measurement and Control of Ultrafast Electronic Coherence

超快电子相干性的测量与控制

• 批准号: 2892760
• 金额: --
• 依托单位: Imperial College London
• 依托单位国家: 英国
• 项目类别: Studentship
• 财政年份: 2023
• 资助国家: 英国
• 起止时间: 2023 至 无数据
• 项目状态: 未结题
• 来源: https://gtr.ukri.org/projects?ref=studentship-2892760
• 关键词: Measurement; Control; Ultrafast; Electronic; Coherence

The project is concerned with the measurement of attosecond time-scale electron dynamics associated with electronic wavepackets (superpositions) formed e.g. in suddenly ionised and suddenly excited neutral molecules. It will seek to apply these measurements to both isolated gas phase molecules and condensed phase systems. The goal will be to gain a better understanding of the interactions that lead to electronic state decoherence of the wavepacket initially excited and to understand how the charge migrates within the quantum system where it may undergo oscillatory motion. The basic tool we will use are attosecond time domain soft X-ray pulses. The main thrust will be carrying out the measurements using both in-house HHG set-ups and the X-ray FELS e.g. LCLS, free electron laser in Stanford, California, but other XFELs will be employed if they offer the required capabilities. In a second phase of the work strategies to control the evolution of the electronic coherences using additional external fields will be investigated. There is strong scope for accompanying theoretical work to interpret the experiments

该项目涉及测量与例如在突然电离和突然激发的中性分子中形成的电子波包(叠加)相关的阿秒时间尺度电子动力学。它将寻求将这些测量应用于孤立的气相分子和凝聚相系统。我们的目标将是更好地了解导致最初激发的波包电子态退相干的相互作用，并了解电荷如何在量子系统中迁移，在那里它可能经历振荡运动。我们将使用的基本工具是阿秒时间域软X射线脉冲。主要的推力将是使用内部HHG装置和X射线自由电子激光器(例如加州斯坦福的LCLS)进行测量，但如果其他XFELs提供所需的能力，则将使用其他XFELs。在工作的第二阶段，将研究利用额外的外场控制电子相干演化的战略。有很大的余地伴随着理论工作来解释这些实验