Study of molecules and clusters in intense laser fields using the quantum trajectory-based Coulomb-corrected strong-field approximation

使用基于量子轨迹的库仑校正强场近似研究强激光场中的分子和团簇

• 批准号: 241260867
• 负责人: Professor Dr. Dieter Bauer
• 金额: --
• 依托单位: AG Quantentheorie und Vielteilchensysteme
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2013
• 资助国家: 德国
• 起止时间: 2012-12-31 至 2017-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/241260867?language=en
• 关键词: Study; molecules; clusters; intense; laser

The interaction of atoms or molecules with intense laser pulses requires a theoretical description beyond conventional perturbation theory. In the widely applied strong field approximation (SFA) the laser field is neglected up to the ionization time while the Coulomb interaction between electron and ion is neglected after the ionization. However, it turned out that many of the experimentally observed or via the exact solution of the time-dependent Schrödinger equation found properties of photoelectron spectra are due to Coulomb effects, and thus are not accessible to the SFA. We have developed a Coulomb correction to the SFA which relies on so-called quantum orbits. In this way, any feature of photoelectron spectra may be interpreted in terms of interfering quantum trajectories - which amounts to maximum insight into quantum dynamics. In the proposed project, we want to extend the method and apply it to more complex systems such as molecules and clusters.

原子或分子与强激光脉冲的相互作用需要超越传统微扰理论的理论描述。在广泛应用的强场近似（SFA）中，在电离时间之前忽略激光场，而在电离时间之后忽略电子和离子之间的库仑相互作用。然而，事实证明，许多实验观察到的或通过与时间相关的薛定谔方程的精确解发现的光电子光谱特性都是由于库仑效应，因此无法获得。我们开发了一种依赖于所谓量子轨道的 SFA 库仑校正，通过这种方式，光电子光谱的任何特征都可以用干涉量子轨迹来解释——这相当于对量子动力学的最大程度的了解。在拟议的项目中，我们希望扩展该方法并将其应用于更复杂的系统，例如分子和簇。

项目成果

Laser-Driven Recollisions under the Coulomb Barrier.

• DOI: 10.1103/physrevlett.117.243003
• 发表时间: 2016-08
• 期刊: Physical review letters
• 影响因子: 8.6
• 作者: T. Keil;S. Popruzhenko;Dieter Bauer

Collective-field-corrected strong field approximation for laser-irradiated metal clusters

激光照射金属团簇的集体场校正强场近似

• DOI: 10.1088/0953-4075/47/12/124029
• 发表时间: 2014
• 期刊: Journal of Physics B: Atomic, Molecular and Optical Physics
• 作者: Th. Keil;D. Bauer
• 通讯作者: D. Bauer

Coulomb-corrected strong-field quantum trajectories beyond dipole approximation

• DOI: 10.1088/1361-6455/aa8ab1
• 发表时间: 2017-10-14
• 期刊: JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS
• 影响因子: 1.6
• 作者: Keil, Th;Bauer, D.
• 通讯作者: Bauer, D.