Multiphoton Ionization of Atoms by Intense Fields (Physics)

这项拨款的目的是制定一个易于处理的理论，用于处理由于激光场过于强烈而不能被视为扰动的原子电离。计算特定通道的电离率是一个具有挑战性的问题。在处理连续体的过渡时所固有的发散积分将通过在速度计中工作和用代数方法消除发散来处理。提出了一些“非摄动”方法。与原子的多光子电离有关的其他问题也将被探讨。

The objective of this grant is the formulation of a tractable theory for treating ionization of atoms by laser fields too intense to be regarded as a perturbation. The calculation of ionization rates to specific channels poses a challenging problem. The divergent integrals inherent in dealing with transitions through the continuum will be handled by working in the velocity gauge and algebraically manipulating the cancellation of divergences. Some "nonperturbative" methods are proposed. Other problems associated with multiphoton ionization of atoms will also be explored.