Novel method for directnumerical solution of scattering equations

散射方程直接数值求解的新方法

• 批准号: 21540406
• 负责人: TOSHIMA Nobuyuki
• 金额: $ 3.08万
• 依托单位: University of Tsukuba
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2009
• 资助国家: 日本
• 起止时间: 2009 至 2012
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-21540406/
• 关键词: 原子・分子; 散乱理論; 反陽子捕獲; 再散乱過程; 短パルス強レーザー; 多価イオン; 高次高調波; 干渉; 因果律; CEP; オージェ効果; 赤外レーザー; 超短パルスレーザー; 相対論的補正; 共鳴状態

Novel method was developed for solving scattering equations of the processes in which hundreds of thousand channels are coupled. Those processes can never be solved by the traditional method in which scattering differential equations are solved as a boundary-condition problem. In our method the Schroedinger equations is converted to a time-dependent integral equation and it is solved as an initial-condition problem corresponding to the causality using the direct integration method on the grid representation. On the way of the research, the procedure turned out to be applicable to wide physical processes other than the scatterings and it was successfully applied to the dynamics of atoms and molecules in short-pulse strong laser fields.

提出了一种求解数十万通道耦合过程散射方程的新方法。传统的方法是将散射微分方程作为边界条件问题来求解，这是无法解决的。在我们的方法中，薛定谔方程转换为一个时间相关的积分方程，它是解决作为一个初始条件的问题，对应的因果关系，使用直接积分方法的网格表示。在研究过程中，该方法不仅适用于散射过程，而且适用于更广泛的物理过程，并成功地应用于短脉冲强激光场中原子和分子的动力学研究。

项目成果

Laser-enhanced Auger Decay in rare-gas atoms

稀有气体原子中的激光增强俄歇衰变

• 发表时间: 2011
• 期刊: Physical Review Letters
• 影响因子: 8.6
• 作者: P.Ranitovic;X.M.Tong,,…;N.To shima,…;H.C.Kapteyn
• 通讯作者: H.C.Kapteyn

Mechanisms of infrared-laser-assisted atomic ionization by attsecond pulses

阿秒脉冲红外激光辅助原子电离机制

• 发表时间: 2010
• 期刊: Phys.Rev.A 81
• 作者: X.M.Tong;P.Ranitovic;C.L.Cocke;N.Toshima
• 通讯作者: N.Toshima

Protonium formation in low-energy antiproton-hydrogen-atom collisions A case study of the V-coordinates with the mass polarization tem

低能反质子-氢原子碰撞中质子的形成 V 坐标与质量极化温度的案例研究

• 发表时间: 2012
• 作者: 遠藤有希;二国徹郎;X.M.Tong and N.Toshima
• 通讯作者: X.M.Tong and N.Toshima

Enhanced ionization of hydrogen molecular ions in an intense laser field via a multiphoton resonance

• DOI: 10.1103/physreva.81.013408
• 发表时间: 2010-01
• 期刊: Physical Review A
• 影响因子: 2.9
• 作者: Ying-Jun Jin;X. Tong;N. Toshima

Coulomb focusing effect on the space distribution of the rescattering electron wavepacket in the laser–atom interaction

• DOI: 10.1088/0953-4075/42/16/165603
• 发表时间: 2009-07
• 期刊: Journal of Physics B: Atomic, Molecular and Optical Physics
• 作者: K. Sasaki;X. Tong;N. Toshima