Model for atomic dielectric response in strong, time-dependent laser fields
Model for atomic dielectric response in strong, time-dependent laser fields
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强、随时间变化的激光场中原子介电响应模型
DOI：
10.1103/physreva.89.033418
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发表时间：
2013
影响因子：
2.9
通讯作者：
D. Gordon
中科院分区：
文献类型：
--
作者：
T. Rensink;T. Antonsen;J. Palastro;D. Gordon
提出了一个计算强激光电场作用下原子介电响应的非定域量子力学模型。通过在Schr“odinger方程中用一个非定域势代替库仑势，一个含时电偶极矩的3 + 1维计算可以重新表述为一个0 + 1维积分方程，该方程保留了三维动力学，同时提供了显著的计算节省.该模型是基准建立的电离模型和从头计算模拟的含时薛定谔方程。减少的计算开销使该模型成为一个有前途的候选人，将全量子力学时间动力学在激光脉冲传播模拟。
A nonlocal quantum-mechanical model is presented for calculating the atomic dielectric response to a strong laser electric field. By replacing the Coulomb potential with a nonlocal potential in the Schr\"odinger equation, a 3 + 1-dimensional calculation of the time-dependent electric dipole moment can be reformulated as a 0 + 1-dimensional integral equation that retains the three-dimensional dynamics, while offering significant computational savings. The model is benchmarked against an established ionization model and ab initio simulation of the time-dependent Schr\"odinger equation. The reduced computational overhead makes the model a promising candidate to incorporate full quantum-mechanical time dynamics in laser pulse propagation simulations.