Department of Mathematics, University of Bergen, N-5007 Bergen, Norway.
Phys Rev Lett. 2010 Apr 23;104(16):163002. doi: 10.1103/PhysRevLett.104.163002.
We investigate the impact of electron-electron correlation on the ionization dynamics of helium in intense, high-frequency laser fields by solving the time-dependent Schrödinger equation from first principles. Although we observe a decrease in the total ionization yield at high field strengths, the hallmark of atomic stabilization, the repulsion between the electrons has a detrimental effect on the degree of stabilization, in particular for short pulses. Investigation of the ion channel yields reveals that the double ionization process is less prone to two-electron effects, and consequently exhibits the most distinct signature of stabilization. We also find that commonly used one-dimensional models tend to overestimate the effect of correlation.
我们通过从第一性原理求解含时薛定谔方程，研究了电子-电子相关对强高频激光场中氦原子电离动力学的影响。尽管我们在高场强下观察到总电离产率降低，但原子稳定的标志是电子之间的排斥作用对稳定程度有不利影响，特别是对于短脉冲。对离子通道产率的研究表明，双电离过程不易受到双电子效应的影响，因此表现出最明显的稳定特征。我们还发现，常用的一维模型往往高估了相关的影响。
