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首页> 外文期刊>Physical Review, A. Atomic, molecular, and optical physics >Time-dependent R-matrix calculations for multiphoton ionization of argon atoms in strong laserpulses
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Time-dependent R-matrix calculations for multiphoton ionization of argon atoms in strong laserpulses

机译:强激光脉冲中氩原子的多光子电离的时变R矩阵计算

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摘要

A recently developed [Guan et al., Phys. Rev. A 76, 053411 (2007)] general ab initio and nonperturbative method to solve the time-dependent Schrodinger equation (TDSE) for the interaction of a strong attosecond laser pulse with a general atom is applied to multiphoton ionization of argon atoms. The field-free Hamiltonian and the dipole matrices are generated using a flexible B-spline R-matrix method, which allows for the use of nonorthogonal sets of one-electron orbitals. The solution of the TDSE is propagated in time using the Arnoldi-Lanczos method. The effects of the pulse length and the laser intensity on the ionization rate for different photon energies are analyzed. In the long-pulse regime, good agreement with predictions from R-matrix Floquet calculations is achieved.
机译:最近开发的[Guan et al。,Phys。 Rev. A 76,053411(2007)]解决了强阿秒激光脉冲与普通原子相互作用的时间依赖性Schrodinger方程(TDSE)的通用从头算和非扰动方法,该方法适用于氩原子的多光子电离。无场哈密顿矩阵和偶极矩阵是使用灵活的B样条R矩阵方法生成的,该方法允许使用非正交的单电子轨道集。 TDSE的解决方案使用Arnoldi-Lanczos方法及时传播。分析了脉冲长度和激光强度对不同光子能量的电离速率的影响。在长脉冲状态下,与R-矩阵Floquet计算的预测结果非常吻合。

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