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

该项目涉及测量与形成的电子波袋（叠加）相关的attseent时尺度电子动力学，例如突然在电离和突然激发中性分子中。它将寻求将这些测量结果应用于孤立的气相分子和凝结相系统。目的是更好地了解导致波袋的电子状态变质的相互作用，并了解电荷在量子系统中如何迁移，在量子系统中如何迁移它可能会发生振荡运动。我们将使用的基本工具是attosent Time域软X射线脉冲。主要推力将使用内部HHG设置和X射线固定器进行测量，例如LCLS，加利福尼亚州斯坦福大学的免费电子激光器，但如果提供所需的功能，其他Xfels将被使用。在第二阶段，将研究使用其他外部磁场来控制电子相干的演变的工作策略。伴随理论工作的范围很强，可以解释实验